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Full-Text Articles in Other Ecology and Evolutionary Biology

Re-Examining Endemic Smoky Dace As An Indicator Species In The Upper Little Tennessee River Index Of Biological Integrity, Tayton C. Alvis, William O. Mclarney, Radmila Petric, Jason P. Love Jul 2026

Re-Examining Endemic Smoky Dace As An Indicator Species In The Upper Little Tennessee River Index Of Biological Integrity, Tayton C. Alvis, William O. Mclarney, Radmila Petric, Jason P. Love

Southeastern Fishes Council Proceedings

Fish communities can be used to evaluate water quality and stream ecosystem health, helping resource managers understand the effects of anthropogenic disturbance. Fish species inform indexes of biological integrity through their ecological traits and tolerance to stressors (e.g. tolerant of disturbance, intolerant of disturbance), but these designations are difficult to determine without localized, species-specific information. The Upper Little Tennessee River watershed is subject to long-term aquatic biomonitoring, applying an index of biological integrity tailored to the region. In this index, the undescribed endemic Smoky Dace (Clinostomus sp.) is classified as intolerant based on a previous designation for the Rosyside Dace …

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Testing The Accuracy Of A Bear-Tracking Satellite Transmitter Collar Under Natural Conditions, K. A. Watson, K. Phipps, C. Drexler, C. R. Middaugh, M. Means, M. Hooks Jun 2026

Testing The Accuracy Of A Bear-Tracking Satellite Transmitter Collar Under Natural Conditions, K. A. Watson, K. Phipps, C. Drexler, C. R. Middaugh, M. Means, M. Hooks

Journal of the Arkansas Academy of Science

The Arkansas Game and Fish Commission tracks American black bears (Ursus americanus) using Global Positioning System (GPS) satellite telemetry collars in southeastern Arkansas to assess habitat use and behaviors. Companies test the accuracy of their devices, but researchers have found that natural environments, such as the forested habitat of black bears, can cause an increase in spatial error rates. We therefore tested 1 GPS collar in realistic conditions to help refine data interpretation. We placed the collar at 20 random locations in Columbia County, AR, stratifying habitat type based on data collected from black bears. We determined the …

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Assessing The Impact Of Lampenflora Growth On Invertebrate Distribution And Food Resource Use In Ryusen-Do Cave, Japan, Kazuhide Nakajima, Kanato Ando, Shuji Watanabe, Masuo Komukai Mar 2026

Assessing The Impact Of Lampenflora Growth On Invertebrate Distribution And Food Resource Use In Ryusen-Do Cave, Japan, Kazuhide Nakajima, Kanato Ando, Shuji Watanabe, Masuo Komukai

International Journal of Speleology

Subterranean spaces, such as caves with openings to the surface, represent unique environments characterized by limited resources derived from photosynthetic primary production. Consequently, organic inputs from organisms inhabiting above- and belowground habitats, such as bats, play a crucial role in maintaining cave ecosystems. However, in show caves converted into tourist attractions, environmental changes have progressed without sufficient ecological assessment. One important factor is the impact of photosynthetic organisms colonizing around artificial lights, known as lampenflora, on cave ecosystems. Lampenflora growth may influence invertebrate distribution and resource use; however, its impact on both aspects has been poorly evaluated. In this study, …

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Impact Of Legacy Amf Communities On Vegetative Growth & Yield Of Soybean, Dylan Habeeb, Connor Morozumi, Natalie Christian Mar 2026

Impact Of Legacy Amf Communities On Vegetative Growth & Yield Of Soybean, Dylan Habeeb, Connor Morozumi, Natalie Christian

The Cardinal Edge

Soil microbial communities are increasingly recognized as an important factor in sustainable agriculture. Arbuscular mycorrhizal fungi (AMF), are key players in these communities, known to benefit their plant host in a number of ways, such as increased nutrient uptake. Plants can partner with multiple AMF species; however, little is known about how interactions between multispecies communities of AMF impact plant growth and yield. In an agricultural setting, the long-term development of these communities following practices such as rotational planting or cover cropping is also an important consideration, but there is little research on the long-term legacy of AMF communities or …

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Leaf Droppage Delayed In Sugar Maple Trees On An Urban To Rural Gradient, Isabella S. Bastien, Isabella Bastien Mar 2026

Leaf Droppage Delayed In Sugar Maple Trees On An Urban To Rural Gradient, Isabella S. Bastien, Isabella Bastien

The Cardinal Edge

This study investigates the timing of leaf abscission in Sugar Maple (Acer saccharum) trees along an urban-to-rural gradient in Louisville, Kentucky, to determine how proximity to urban environments influences leaf drop. We hypothesized that urban trees would retain their leaves longer than suburban or rural trees due to environmental stressors and tested this using weekly leaf collection and canopy cover measurements from three locations—urban, suburban, and rural. Results showed that urban trees exhibited delayed leaf drop and slower canopy opening compared to suburban and rural trees. These findings suggest that urban stressors significantly alter tree phenology, which may signal underlying …

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Vegetation Species And Bed Position May Drive Epifaunal But Not Nekton Habitat Use In Estuarine Submerged Vegetation In The Mobile-Tensaw River Delta, Alabama, Steven Vroljik, Kathryn O'Shaughnessy, Ashley Mcdonald, Zoey Hendrickson, Bethany Kiley, Anna Reimer, Sierra Robertson, Samantha Smith, Edward Sullivan, Charles Martin Jan 2026

Vegetation Species And Bed Position May Drive Epifaunal But Not Nekton Habitat Use In Estuarine Submerged Vegetation In The Mobile-Tensaw River Delta, Alabama, Steven Vroljik, Kathryn O'Shaughnessy, Ashley Mcdonald, Zoey Hendrickson, Bethany Kiley, Anna Reimer, Sierra Robertson, Samantha Smith, Edward Sullivan, Charles Martin

Gulf and Caribbean Research

Submerged aquatic vegetation (SAV) supports nekton and epifaunal macroinvertebrates, sustaining food webs and ecosystem services in estuaries. Invasive SAV can alter these dynamics by displacing native vegetation and restructuring communities. In Alabama’s Mobile-Tensaw Delta (MTD), Eurasian milfoil (Myriophyllum spicatum) is rapidly expanding and outcompeting native wild celery (Vallisneria americana). This study compared nekton and epifaunal assemblages between M. spicatum and V. americana, focusing on edge versus interior positions. Nekton surveys identified 22 taxa (M. spicatum, n = 13; V. americana, n = 18), but assemblages did not differ significantly between vegetation types …

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Green Connectivity In Metropolitan Jabodetabek: Climate Change And The Challenge Of Urban Forest, Safira Maharani Putri, Hendricus Andy Simarmata Dec 2025

Green Connectivity In Metropolitan Jabodetabek: Climate Change And The Challenge Of Urban Forest, Safira Maharani Putri, Hendricus Andy Simarmata

CSID Journal of Infrastructure Development

Urban areas in Indonesia, particularly the Greater Jakarta metropolitan region (Jabodetabek), are increasingly experiencing the adverse effects of climate change, such as the Urban Heat Island (UHI) phenomenon. Rapid urbanization has contributed significantly to rising greenhouse gas emissions and deteriorating environmental quality. Urban forests are one of the key solutions to mitigate these impacts; however, their spatial distribution in Jabodetabek remains suboptimal and poorly connected. This study uses NDVI as a proxy for urban forest density, where “urban forest” refers to vegetated areas within cities as defined by Presidential Regulation No. 60/2020. The research addresses the following question: How has …

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Just "Beet" It? A Comparison Of Road Salt Effects On The Life History Of Daphnia Magna, Koby Sellner Dec 2025

Just "Beet" It? A Comparison Of Road Salt Effects On The Life History Of Daphnia Magna, Koby Sellner

The Journal of Purdue Undergraduate Research

In areas that experience snow and ice, deicing reagents such as road salts are often used on roads to promote safer driving conditions. However, road salts run off into local vegetation, soil systems, and (my focus) freshwater systems. The impacts of excess salt and chloride in freshwater have been studied extensively on a broad diversity of organisms under different conditions, but previous studies have rarely used different types of road salts. Zooplankton are primary consumers in many freshwater systems, feeding on phytoplankton and serving as prey for predator species higher in the trophic chain. These animals generally are impacted negatively …

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Current Threat To The Native Endemic Muckalee Crayfish (Procambarus Gibbus) From An Invasive Crayfish (Faxonius Palmeri Creolanus) And Tests Of Cold Tolerance As A Limiting Factor, Alexandria L. Exum, Nickeya Wynn, William Ellerbee, Madaline Toth, Otto T. Lorenz Dec 2025

Current Threat To The Native Endemic Muckalee Crayfish (Procambarus Gibbus) From An Invasive Crayfish (Faxonius Palmeri Creolanus) And Tests Of Cold Tolerance As A Limiting Factor, Alexandria L. Exum, Nickeya Wynn, William Ellerbee, Madaline Toth, Otto T. Lorenz

Georgia Journal of Science

Surveys for native and invasive crayfish were conducted in Muckalee creek in 2015 and 2021. Both surveys used passive minnow traps and examined upstream and downstream sites, including at the mouth of the creek where it connects with the Flint River. The Flint River has been overrun with an invasive crayfish species, Faxonius palmeri creolanus (Creole Painted Crayfish) and its range has spread rapidly throughout southwest Georgia. In Muckalee Creek there were only a few F. p. creolanus found during each survey and both times they were only found at the mouth of the creek. One hypothesis on why they …

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The Effects Of Plastic Mulch And Irrigation On Hemp Chemistry And Leaf Endophytes, Allison Rietman, Connor Morozumi, Robert C. Pearce, Natalie Christian Oct 2025

The Effects Of Plastic Mulch And Irrigation On Hemp Chemistry And Leaf Endophytes, Allison Rietman, Connor Morozumi, Robert C. Pearce, Natalie Christian

Journal of Agricultural Hemp Research

As an emerging crop, cultivation techniques for industrial hemp (Cannabis sativa L.) are still being developed and optimized. For example, irrigation and plastic mulching are some management practices that have been touted for their benefits in improving crop quality. Both techniques ensure ample water availability, which has often been attributed to improving hemp cannabinoid and terpene composition. In this study, we examined how supplemental irrigation implemented in a plastic mulch system influenced the cannabinoid and terpene profiles of one cultivar of CBD hemp, Lifter. We grew industrial hemp in field with plastic mulch and applied regular irrigation to one group …

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Mammals Of Malheur National Wildlife Refuge And Surrounding Harney County, Oregon, John E. Cornely, Leslie N. Carraway Jul 2025

Mammals Of Malheur National Wildlife Refuge And Surrounding Harney County, Oregon, John E. Cornely, Leslie N. Carraway

Monographs of the Western North American Naturalist

Malheur National Wildlife Refuge (NWR), located in southeastern Oregon, is part of the National Wildlife Refuge System (NWRS) of the United States. Currently, NWRS includes more than 568 NWRs, 38 Wetland Management Districts, and 5 Marine National Monuments. Malheur NWR, like a majority of the refuges in the NWRS, was established for the conservation of migratory birds. Many of these NWRs also provide significant habitat for mammals. Malheur NWR, one of the oldest (established 1908) and largest refuges in the system, is one of those with significant habitat for mammals. In addition to the refuge, we have included Harney County, …

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The Impact Of Anthropogenic Infrastructure On Avian Reproductive Success: A Study Of House Wrens In Proximity To Highways, Nana-Esi Irie Hanson, Medhavi Ambardar Mar 2025

The Impact Of Anthropogenic Infrastructure On Avian Reproductive Success: A Study Of House Wrens In Proximity To Highways, Nana-Esi Irie Hanson, Medhavi Ambardar

SACAD: Scholarly Activities

Road infrastructure has multifaceted effects on bird populations, influencing various aspects of their ecology and behaviour. I investigated the impact of road infrastructure, particularly highways, on the reproductive success of House Wrens (Troglodytes aedon) in a rural area. I compared the reproductive success of House Wrens in sites close to a major highway (Sternberg Museum Nature Trail) with sites located farther away (along Big Creek) in Hays, KS. I hypothesized that House Wrens near highways would exhibit lower reproductive success. I recorded metrics of reproductive success, traffic volumes, and noise levels. House wrens at the Big Creek site had higher …

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The Effect Of Temperature And Vegetative Substrate On The Short-Distance Dispersal Behavior Of An Invasive Weevil (Coleoptera: Curculionidae) To A Protected Dune Thistle, Alyssa S. Hakes, Tina Czaplinska, Monica Paniagua-Montoya Feb 2025

The Effect Of Temperature And Vegetative Substrate On The Short-Distance Dispersal Behavior Of An Invasive Weevil (Coleoptera: Curculionidae) To A Protected Dune Thistle, Alyssa S. Hakes, Tina Czaplinska, Monica Paniagua-Montoya

The Great Lakes Entomologist

The invasion of a seed-eating weevil, Larinus carlinae (Olivier, 1807) poses a threat to the persistence of native Pitcher's thistle (Cirsium pitcheri), a federally-threatened plant in sand dune communities of the western Great Lakes. At Whitefish Dunes (Sturgeon Bay, WI. USA), seed predation by weevils is higher for thistles surrounded by native marram grass (Ammophila breviligulata) than for those located in sandy habitats. In this study, we observed how the local abiotic and biotic environment affects the short-distance dispersal behavior of L. carlinae. Weevils were captured on site and individually released on the sand approximately …

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Early Season Tropical Cyclones Affect Birds Breeding On A Barrier Island, Theodore J. Zenzal Jr., Amanda N. Anderson, Brock Geary, Jessica Schulz, Robert C. Dobbs, Wylie C. Barrow Jr., James H. Waddle Jan 2025

Early Season Tropical Cyclones Affect Birds Breeding On A Barrier Island, Theodore J. Zenzal Jr., Amanda N. Anderson, Brock Geary, Jessica Schulz, Robert C. Dobbs, Wylie C. Barrow Jr., James H. Waddle

Gulf and Caribbean Research

Animal populations often experience acute natural disturbances, most of which are connected to short—term weather events. Occurrences of early—season tropical cyclones during the peak of the avian breeding season are likely to increase with climate change, which can substantially impact populations of coastal breeding birds at multiple scales. To understand the acute impacts of severe tropical cyclones, we investigated how abundances of breeding birds changed before and after 4 early season named tropical cyclones on a barrier island in the Gulf of Mexico. We detected a change in pre— versus post—storm numbers of breeding birds after 2 out of 4 …

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Habitat Loss And Its Behavioral Effects On A Female Gray Hawk In The Lower Rio Grande Valley Of Texas, Usa, Michael T. Stewart, Ashley M. Tanner, Brian A. Millsap, William S. Clark Jan 2025

Habitat Loss And Its Behavioral Effects On A Female Gray Hawk In The Lower Rio Grande Valley Of Texas, Usa, Michael T. Stewart, Ashley M. Tanner, Brian A. Millsap, William S. Clark

Human–Wildlife Interactions

Habitat loss is a major threat to wildlife worldwide. While habitat loss is commonly associated with the fragmentation, degradation, or destruction of large tracts of suitable space, habitat loss in urban environments can be much more incremental and nuanced. We tracked an adult female gray hawk (Buteo plagiatus) in the Lower Rio Grande Valley of Texas, USA, before and after 70% of the trees (7.6 ha) were cleared from the core of the nesting territory. While the hawk’s overall activity budget between within-patch and exploratory movements was unchanged, the hawk undertook substantially longer exploratory movements after the trees …

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Seasonal Occupancy Of The Thermal Plume Of A Spring Tributary To The South Fork Roanoke River, Virginia., Steven L. Powers, Michael M. Calvert, Charlotte M. Spaulding Dec 2024

Seasonal Occupancy Of The Thermal Plume Of A Spring Tributary To The South Fork Roanoke River, Virginia., Steven L. Powers, Michael M. Calvert, Charlotte M. Spaulding

Southeastern Fishes Council Proceedings

Detection of temperate stream fishes varies widely across seasons as streams teeming with life in summer often appear empty during winter sampling efforts. While much literature documents the disproportionate use of the thermal plumes of spring tributaries by cold water fishes during summer, few studies have investigated occupancy of those habitats by warm water fishes in winter. We conducted quantitative snorkeling observations within the near uniform temperatures (10-14oC) of the thermal plume of a spring tributary to the South Fork Roanoke River across seasons and compared number of fishes observed and species richness to control observations made just …

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Ecological Niches Applied To Socioeconomic Phenomena: The Case Of The Colombian Internal Conflict, Alexander Alegría, Laura Jiménez, Jhon Jairo Alvarado-Quintero Dec 2024

Ecological Niches Applied To Socioeconomic Phenomena: The Case Of The Colombian Internal Conflict, Alexander Alegría, Laura Jiménez, Jhon Jairo Alvarado-Quintero

Peace and Conflict Studies

Recent studies of the Colombian conflict have shown that struggle for resource accumulation and territorial control, in a very competitive and violent environment in which the illegal armed groups are involved, is crucial to their survival and development. Here, we applied a highly successful methodology from ecology (Ecological Niche Modelling) to the problem of identifying the ideal socioeconomic conditions for the presence of a Colombian illegal armed group, named the Revolutionary Armed Forces of Colombia (FARC). We analyzed some determining factors of FARC´s presence and permanence within the Colombian territory that reflect aspects of the socioeconomic dynamics and productive capacity …

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Invasive Species Common Names: Working Towards More Inclusive Invasive Species Education And Outreach, Megan M. Weber, Angela Gupta, Nicholas B.D. Phelps, Douglas A. Jensen, Robert C. Venette Sep 2024

Invasive Species Common Names: Working Towards More Inclusive Invasive Species Education And Outreach, Megan M. Weber, Angela Gupta, Nicholas B.D. Phelps, Douglas A. Jensen, Robert C. Venette

Journal of Extension

Invasive species harm natural and managed ecosystems. Awareness and management of these species depends on effective education and outreach. Traditional common names, including those with geographic references, for many invasive pests may perpetuate slanderous terms or stigmatize people from that place. To create more inclusive invasive species educational materials, the University of Minnesota Extension’s Invasive Species Community of Practice developed guidelines for selection of common names. Suggested names were shared with others involved in invasive species communications, leading to broader adoption. These guidelines may be useful to others who struggle to find descriptive, non-alienating common names for invasive species.

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Postweaning Skull Growth In Living Didelphid Marsupials: The Case Of Gracilinanus Agilis And Cryptonanus Chacoensis, Iveth A. Villalobos Guerrero, Noé U. De La Sancha Jul 2024

Postweaning Skull Growth In Living Didelphid Marsupials: The Case Of Gracilinanus Agilis And Cryptonanus Chacoensis, Iveth A. Villalobos Guerrero, Noé U. De La Sancha

DePaul Discoveries

Ontogeny is described as the history of an organism through its lifetime including development, growth, and allometry. The ontogenetic approach in cranial dimensions has proved useful in interpreting evolutionary patterns. Among the largest Didelphidae family of Neotropical marsupials, the species of Gracilinanus agilis and Cryptonanus chacoensis are poorly known. In this study, we address three questions; Is there sexual dimorphism in these species? What is the pattern of allometry? Which allometric patterns best describe the patterns in the skull and mandible? We applied geometric morphometrics to describe and test these differences using MorphoJ. A discriminant function analysis was performed to …

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Reproductive Characteristics Of The Stripetail Darter (Etheostoma Kennicotti) Relative To Monogenean Gill Parasite Infection In Estill Fork In North Alabama, Joy L. Garcia, Zeina Celine Sleiman, Corinne N. Preacher, Bruce Stallsmith Apr 2024

Reproductive Characteristics Of The Stripetail Darter (Etheostoma Kennicotti) Relative To Monogenean Gill Parasite Infection In Estill Fork In North Alabama, Joy L. Garcia, Zeina Celine Sleiman, Corinne N. Preacher, Bruce Stallsmith

Southeastern Fishes Council Proceedings

What relationship exists between Aethycteron sp. gill parasite infection and the reproductive characteristics of stripetail darters, Etheostoma kennicotti? 450 E. kennicotti were collected over 11 months from Estill Fork in Jackson County, Alabama. Gonads were removed and photographed. All oocytes were counted and then classified into one of four developmental stages based on size and appearance. Gill parasites belonging to the monogenean genus Aethycteron were excised, photographed, and counted. Sexual dimorphism in length and mass was observed in E. kennicotti. The number of males found at the 25> mm SL range far outnumbered the females while almost all …

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Ornithofauna Diversity Of Tehsil Pakpattan, Punjab, Pakistan, Muhammad Amir Sial Mar 2024

Ornithofauna Diversity Of Tehsil Pakpattan, Punjab, Pakistan, Muhammad Amir Sial

Journal of Bioresource Management

Tehsil Pakpattan is situated in the Doab region of Punjab, Pakistan, along the Sutlej River. The present study aimed to evaluate the avian biodiversity of Tehsil Pakpattan. The study included the evaluation of species diversity, IUCN Red List status, migratory description, and feeding habits of the bird populations of Tehsil Pakpattan. Regular surveys were conducted at ten different localities in Tehsil Pakpattan, including Islam Colony, Kanipur, Farid Kot, 14 S/P, Chak Khagga, Musewal, 8 S/P, Noorpur, Green Town, and Bonga Niaz Khan, from January 2022 to April 2023. The Shannon‒Wiener diversity index value (R' = 3.41) indicated the notable diversity …

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Sense Of Place In Natural Resource Recreation And Tourism: An Evaluation And Assessment Of Research Findings. Feb 2024

Sense Of Place In Natural Resource Recreation And Tourism: An Evaluation And Assessment Of Research Findings.

The International Journal of Ecopsychology (IJE)

No abstract provided.

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Eristalis Tenax Movement Behavior In Response To Light, Temperature, And Food, Jeffery J. Zheng, Zdena M. Janderova, Jason D. Lang Jan 2024

Eristalis Tenax Movement Behavior In Response To Light, Temperature, And Food, Jeffery J. Zheng, Zdena M. Janderova, Jason D. Lang

Georgia Journal of Science

Drone flies, Eristalis tenax (Diptera: Syrphidae), are important generalist pollinators and visit flowers globally that range widely in color. The flies’ photoreceptors allow them to sense light wavelengths between 300-600 nm and E. tenax exhibit a positive phototactic response. To understand the effects of light on E. tenax movement, we conducted two-choice behavioral tests to determine their phototactic response to different wavelengths of light across the spectrum (ultraviolet to red light, plus full spectrum white light). The drone flies moved most and quickest toward sunlight, with almost twice the percentage of flies moving toward sunlight than toward black and …

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Nekton Community Responses To Living Shoreline Restorations In Alabama, Shelby Kuck, Christopher Grant, Matheus De Barros, Alexandra Rodriguez, Ronald Baker Jan 2024

Nekton Community Responses To Living Shoreline Restorations In Alabama, Shelby Kuck, Christopher Grant, Matheus De Barros, Alexandra Rodriguez, Ronald Baker

Gulf and Caribbean Research

No abstract provided.

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Stable Isotope Analysis Of Antipatharian Diets From The Northwestern Gulf Of Mexico, Keir J. Macartney, Victoria Salinas, Zachary Rivera, David Hicks Jan 2024

Stable Isotope Analysis Of Antipatharian Diets From The Northwestern Gulf Of Mexico, Keir J. Macartney, Victoria Salinas, Zachary Rivera, David Hicks

Gulf and Caribbean Research

Antipatharians, or black corals, form a key component of the benthic fauna found throughout the Gulf of Mexico (GOM). In the northwestern GOM, they are a common member of the communities found on the natural relic coral—algal banks known as the South Texas Banks as well as on artificial reefs. They are known to provide important habitat for many ecologically and economically important species in the area but are relatively understudied. Here we present a study on their trophic ecology using stable isotope analysis of carbon and nitrogen from 2 species, Antipathes atlantica and Stichopathes luetkeni from a mesophotic artificial …

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An Effective Method For Long-Term Control Of American Bullfrogs Syntopic With Special-Status Native Amphibians In California, Usa, Jeff A. Alvarez, Jeffery T. Wilcox Jan 2024

An Effective Method For Long-Term Control Of American Bullfrogs Syntopic With Special-Status Native Amphibians In California, Usa, Jeff A. Alvarez, Jeffery T. Wilcox

Human–Wildlife Interactions

American bullfrogs (Lithobates catesbeianus) are invasive in western North America and are well established in California, USA, where they are widespread. This invasive species has been implicated in the decrease of native amphibian populations and is believed to have contributed to the decline of threatened and endangered amphibians regionally. We utilized air rifles, tin alloy pellets, and 2 shooters to systematically control L. catesbeianus in both lentic and lotic habitat types within 2 counties in California. We visited sites monthly (April through November) for approximately 8 and 14 years to lethally target and remove L. catesbeianus …

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Lead, Cadmium, And Mercury Concentration Levels In Some Commercial Fish From The Arabian Sea And The Gulf Of Aden During The Years 2020–2022, Khaled Awadh Al-Rabaki, Salem Rabie Bazar, Ahmed Ali Balqadi, Nabil Shayif Al-Hudaifi, Marwan Ahmed Al-Habashi, Nadia Ahmed Balasuad, Muhammad Abdurrahman Ba-Omer Nov 2023

Lead, Cadmium, And Mercury Concentration Levels In Some Commercial Fish From The Arabian Sea And The Gulf Of Aden During The Years 2020–2022, Khaled Awadh Al-Rabaki, Salem Rabie Bazar, Ahmed Ali Balqadi, Nabil Shayif Al-Hudaifi, Marwan Ahmed Al-Habashi, Nadia Ahmed Balasuad, Muhammad Abdurrahman Ba-Omer

Hadhramout University Journal of Natural & Applied Sciences

This study was conducted to determine and evaluate the heavy metal concentrations levels: lead (Pb), cadmium (Cd), and mercury (Hg) in the meat of some commercial fish species: Grouper (Epinephelus areolatus), Emperor (Lethrinus nebulosus) and Cuttlefish (Sepia Pharaonis). A total of 84 fish samples were caught and collected from different sites in the Gulf of Aden and the Arabian Sea between January 2020 and December 2022. Some of them were sold in the cities markets of Hadhramout governorate- Yemen, and some of them were exported abroad. All samples were analyzed at the laboratories of the Faculty of Environmental Sciences and …

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The Deep Ecology Movement Sep 2023

The Deep Ecology Movement

The International Journal of Ecopsychology (IJE)

There are two great streams of environmentalism in the latter half of the twentieth century. One stream is reformist, attempting to control some of the worst of the air and water pollution and inefficient land use practices in industrialized nations and to save a few of the remaining pieces of wildlands as "designated wilderness areas." The other stream supports many of the reformist goals but is revolutionary, seeking a new metaphysics, epistemology, cosmology, and environmental ethics of person/planet. This paper is an intellectual archeology of the second of these streams of environmentalism, which I will call deep ecology.

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An Analysis Of Lichen Presence On Quercus And Non-Quercus In Chicagoland Area, Shelby Johnson Jun 2023

An Analysis Of Lichen Presence On Quercus And Non-Quercus In Chicagoland Area, Shelby Johnson

DePaul Discoveries

Both anthropogenic change and the spread of invasive species have led to changes in urban and forest tree diversity. Oak rust, acute oak decline, and emerald ash borer have all had a detrimental effect on tree species in the Chicagoland area. Quercus species are well known habitats for lichen species including Physcia millegrana, Physcia stellaris, Punctelia rudecta, Flavoparmelia caperata, Xanthomendosa, and Candeleria concolor. Due to the decrease in the traditional Quercus habitats for lichen and the increase in nonnative and nontraditional tree species being introduced, particularly in cities, this study aimed to compare the number and diversity of …

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Development Of A 16s Reference Library For Edna Metabarcoding The Freshwater Fishes Of Western Ecuador., Hannah M. Willis, Olivia G. Schweikart, Windsor E. Aguirre Jun 2023

Development Of A 16s Reference Library For Edna Metabarcoding The Freshwater Fishes Of Western Ecuador., Hannah M. Willis, Olivia G. Schweikart, Windsor E. Aguirre

DePaul Discoveries

This project examines the use of the 16S locus to amplify neotropical freshwater fishes native to Western Ecuador in a newly created 16S reference library for DNA barcoding and eDNA metabarcoding applications. Among the orders Characiformes, Siluriformes, Cichliformes, Gobiiformes, Cryprinodontiformes, Gymnotiformes, and Perciformes, a compendium of 105 specimens were sequenced, with 43 representing new 16S sequences previously unavailable on Genbank.

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