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Articles 1 - 16 of 16
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Water Quality Of Madari Khal Tributary Of The Halda River, Chattogram, Bangladesh, Md. Shafiqul Islam, M.A. Azadi
Water Quality Of Madari Khal Tributary Of The Halda River, Chattogram, Bangladesh, Md. Shafiqul Islam, M.A. Azadi
Journal of Bioresource Management
Tidal canal Madari-Khal is one of the important tributaries of the river Halda, through which nearby hill stream water, agricultural washings, and effluents (treated or untreated) of Chattogram Asian paper Mill are drained to the Halda River. In this paper water quality and pollution level of Madari Khal are presented. A one-year study was conducted to ascertain the water quality and pollution level by using different physicochemical parameters i.e. Air temperature, Water temperature, Transparency, EC (Electrical Conductivity), TDS (Total Dissolved Solids), pH, DO (Dissolved Oxygen), freeCO2, Ca++ (Calcium), TH (Total Hardness), TA (Total Alkalinity), and Biological Oxygen …
Insect Diversity And Association With Plants: A Case Study In Rural Areas Of Dhirkot, Azad Kashmir Pakistan, Abu Ul Hassan Faiz, Mehboob Ul Hassan, Mikhail F. Bagaturov, Majid Mahmood, Ghazal Tariq, Lariab Zahra Faiz
Insect Diversity And Association With Plants: A Case Study In Rural Areas Of Dhirkot, Azad Kashmir Pakistan, Abu Ul Hassan Faiz, Mehboob Ul Hassan, Mikhail F. Bagaturov, Majid Mahmood, Ghazal Tariq, Lariab Zahra Faiz
Journal of Bioresource Management
Insects play a vital role for proper functioning of forest ecosystem, including positive roles as pollinators, seed dispersers, genetic linkers and detrimental effects by feeding on and/or killing trees. The present study was conducted to find insect association with plants in rural areas of Dhirkot. The study was conducted from March, 2019 to September, 2019. The sampling was carried out by line transect method. Thirty transects were taken for sampling insects. Sixty-five species of insects in association with 150 plants were recorded.
Composition Of Dung Beetle Communities In A Tropical Montane Forest Alters The Rate Of Dung Removal More Than Species Diversity Alone, Elizabeth A. Engle
Composition Of Dung Beetle Communities In A Tropical Montane Forest Alters The Rate Of Dung Removal More Than Species Diversity Alone, Elizabeth A. Engle
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Dung beetles provide key ecological functions by degrading and recycling dung. I used experimentally-assembled communities to examine the role of species richness, community biomass, species diversity, species identity, and community composition in dung removal, using Ateuchus chrysopyge, Copris nubilosis, Onothophagus cyanellus, and Dichotomius satanas. I hypothesized: (1) that as species richness, biomass, and diversity increases within a community, dung removal increases; and (2) species are not functionally equivalent, so community composition should influence dung removal rates. As species richness, biomass, and diversity of experimentally-assembled communities increased, the proportion of dung removed also increased. Also, the four species in this study …
Nutrient Flux From Aquatic To Terrestrial Invertebrate Communities Across A Lakeside Ecotone, Hosanna B. Loreaux
Nutrient Flux From Aquatic To Terrestrial Invertebrate Communities Across A Lakeside Ecotone, Hosanna B. Loreaux
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In this study, I examined how the spatiotemporal distribution of spider webs and diet changed in a lake riparian zone with increasing distance from an aquatic resource. I surveyed twenty, one-hundred meter transects along the perimeters of Sanford and Escanaba lakes (Wisconsin). Overall, spider web abundance was highest near the lakes and decreased moving into the adjacent forest. Horizontal orb webs, vertical orb webs, and mesh webs showed strong negative relationships with distance from the lakes. Aquatic insects composed an average 36-64% of spider diet for all spider families throughout the riparian zone, suggesting that some spider families are selecting …
Checklist Of Zooplanktons In Different Rivers Of Bajwat Area, Zahid Bhatti, Muhammad Asif Gondal, Asad Ghufran, Andleeb Batool
Checklist Of Zooplanktons In Different Rivers Of Bajwat Area, Zahid Bhatti, Muhammad Asif Gondal, Asad Ghufran, Andleeb Batool
Journal of Bioresource Management
Zooplanktons are important fish and waterfowl food. Limnological studies of Marala Wetlands, a complex created by three rivers, i.e., Jammu Tawi, Chenab and Manawar Tawi, entering Bajwat area located 25 km from North of Sialkot city from state of Jammu and Kashmir, were carried out between October, 2000 to September 2001. This survey was carried out to create a checklist of zooplanktons existing in the study site which would help in future studies relating to aquatic biodiversity and ecological studies of wetlands. A minimum of 25 species of zooplanktons were present in the wetland area, which can be included into …
A New Tachinid Genus And Species Record For North America: Iceliopsis Borgmeieri Guimarães, John O. Stireman Iii, Jane E. Dell
A New Tachinid Genus And Species Record For North America: Iceliopsis Borgmeieri Guimarães, John O. Stireman Iii, Jane E. Dell
Biological Sciences Faculty Publications
The Iceliini are a small, enigmatic New World tribe of Tachininae consisting of three genera, Icelia RobineauDesvoidy, Iceliopsis Guimarães, and Erviopsis Townsend, and five recognized species (Guimarães 1976). All known species are exclusively Neotropical in distribution with the exception of Icelia triquetra (Olivier), which ranges from Brazil, through Central America, and as far north as New York state (O’Hara & Wood 2004). Members of the tribe are generally medium-sized (ca. 7–12 mm), elongate, yellowish or grayish in color, and resemble Dexiini or Leskiini in general appearance. Species of Iceliini are relatively rarely collected and there is but a single host …
Feeding Selectivity Of An Algivore (Tropheus Brichardi) In Lake Tanganyika, Robin Richardson-Coy
Feeding Selectivity Of An Algivore (Tropheus Brichardi) In Lake Tanganyika, Robin Richardson-Coy
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Algivorous fish remove attached algae (periphyton) from the benthos in near shore areas of lakes. Periphyton has a complex three-dimensional structure dominated by Bacillariophyta (diatoms), Chlorophyta (green algae), and Cyanophyta (cyanobacteria). These three phyla vary in nutritional quality with diatoms providing essential fatty acids that consumers need for growth and reproduction. Selection of specific phyla may be driven by nutritional quality or it may be a function accessibility due to both mouth morphology of the fish and location of the algae in the periphyton community. I investigated whether Tropheus brichardi, an algivorous cichlid of Lake Tanganyika, selectivity feeds on …
Host Location And Host-Associated Divergence In Parasitoids Of The Gall Midge, Asteromyia Carbonifera, Jeffrey L. Howell
Host Location And Host-Associated Divergence In Parasitoids Of The Gall Midge, Asteromyia Carbonifera, Jeffrey L. Howell
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Some of the world's greatest mysteries are the series of ecological and behavioral processes that promote adaptive radiation: when one species rapidly diverges into multiple descendants due to ecological selective pressures. Selective pressures from natural enemies have the potential to drive such radiations, as has been suggested in the diversification of the goldenrod gall-midge, Asteromyia carbonifera (Stireman et al., 2008, 2012). This complex, multitrophic system involves the midge species complex, their goldenrod host plants (Solidago sp.), and a suite of parasitoid enemies in the diverse wasp superfamily, Chalcidoidea. There is evidence that the midge is undergoing host-associated differentiation (HAD), in …
Species Diversity, Distribution And Seasonal Abundance In Mangrove Associated Molluscs Along The Karachi Coast, Pakistan, Zia Ullah, Itrat Zehra, Muhammad Asif Gondal
Species Diversity, Distribution And Seasonal Abundance In Mangrove Associated Molluscs Along The Karachi Coast, Pakistan, Zia Ullah, Itrat Zehra, Muhammad Asif Gondal
Journal of Bioresource Management
Mangrove or Mangal vegetation are typical wetland ecosystems found in coastal deposits of mud and silt throughout the tropics and some distance into the sub-tropical latitude. Species diversity, distribution, seasonal abundance in population and behavioral responses of mangrove associated molluscs (gastropods and bivalves) were investigated in two mangal areas: Sandspit and Korangi, along the Karachi coast of Pakistan. For sampling, a fixed route was followed throughout the study period and the samples were collected and observations were made from HTZ to LTZ. Fourteen species of molluscs (5 Prosobranchia; 6 Pulmonata; 1 Opisthobranchia and 2 Lamellibranchia) belonging to ten families were …
Opiliones Biodiversity In Cusuco National Park, Honduras, Brittany N. Damron
Opiliones Biodiversity In Cusuco National Park, Honduras, Brittany N. Damron
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Biodiversity in the tropics is especially diverse and describing species found in the tropics is important. Opiliones species richness is higher in the tropics than the temperate zone, with diversity highest in low latitudes. This study aims to catalog the Opiliones community in Cusuco National Park, Honduras, while estimating species richness and describing their abundance, distribution and community structure. Fifty hours of sampling at 6 sites yielded 18 morphospecies and 264 individual Opiliones were collected. This study added one new described species to the Opiliones fauna of Honduras, and fourteen morphospecies may represent new species. An estimated 43 to 112 …
The Sign And Strength Of Plant-Soil Feedback For The Invasive Shrub, Lonicera Maackii, Varies In Different Soils, Kelly Schradin, Don Cipollini
The Sign And Strength Of Plant-Soil Feedback For The Invasive Shrub, Lonicera Maackii, Varies In Different Soils, Kelly Schradin, Don Cipollini
Biological Sciences Faculty Publications
Plants alter soil characteristics causing changes in their subsequent growth resulting in positive or negative feedback on both their own fitness and that of other plants. In a greenhouse study, we investigated whether the sign and strength of feedback changed across two distinct soil types, and whether effects were due to shifts in biotic or abiotic soil traits. Using soils from two different locations, we examined growth of the exotic invasive shrub, Lonicera maackii and the related native shrub, Diervilla lonicera, in unconditioned soils and in soils conditioned by previous growth of L. maackii, D. lonicera, and …
The Role Of Plant-Soil Feedback In Exotic Plant Invasion: Soil Type, Biotic Or Abiotic Factors?, Kelly Dawn Schradin
The Role Of Plant-Soil Feedback In Exotic Plant Invasion: Soil Type, Biotic Or Abiotic Factors?, Kelly Dawn Schradin
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Plants alter soil characteristics in many ways causing changes in their subsequent growth resulting in either positive or negative feedback on their own fitness. Plants in their native ranges typically experience negative feedback from natural enemies, while feedback is often positive in invaded ranges where they escape enemies, experience new beneficial mutualisms, or bring with them a novel biochemical weapon. I conducted a fully factorial greenhouse experiment to examine plant-soil feedback in the invasive shrub Lonicera maackii and whether or not positive feedback may contribute to its successful invasion in southern Ohio. I also investigated whether the sign and strength …
Finding The Trophic Trickle: Using Herbaceous Indicator Species To Investigate Plant Recovery From Intense Browsing By White-Tailed Deer (Odocoileus Virginianus) After The Re-Colonization Of A Top Predator (Canis Lupus), Krystle A. Bouchard
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High densities of white-tailed deer (Odocoileus virginianus) have been implicated in changing forest community structure and composition. Top predators, including gray wolf (Canis lupus), were extirpated from much of their range by the mid 1900s, but have since returned to Northern Wisconsin. To determine whether the re-colonization of wolves could initiate a trophic cascade resulting in the recovery of understory plants from deer browsing, I surveyed four herbaceous species in areas without wolves and areas with 4-6 year old wolf packs and 12-13 year old wolf packs. Plant size and reproduction were greater in areas where wolves had been for …
Habitat Variation Among Aquatic Gastropod Assemblages Of Indiana, U.S.A., Mark Pyron, Jayson Beugly, Matthew Spielman, Jennifer Pritchett, Stephen J. Jacquemin
Habitat Variation Among Aquatic Gastropod Assemblages Of Indiana, U.S.A., Mark Pyron, Jayson Beugly, Matthew Spielman, Jennifer Pritchett, Stephen J. Jacquemin
Biological Sciences Faculty Publications
We collected aquatic gastropods at 137 sites in lakes and streams of Indiana and tested for patterns of assemblages with environmental variables. The survey resulted in 32 species with a mean of 2.8 species at each site, and a mean abundance at each site of 144 individuals. Nonmetric multidimensional scaling (NMS) multivariate analyses resulted in watershed drainage area, water conductivity, substrate category frequency, and dissolved oxygen as significant correlates of gastropod assemblage structure. Gastropod assemblages of lakes were not significantly different than assemblages of streams in the ordination. Prosobranch taxa occurred in higher abundances than pulmonate taxa at sites with …
Implications Of Spatial Autocorrelation And Dispersal For The Modeling Of Species Distributions, Volker Bahn
Implications Of Spatial Autocorrelation And Dispersal For The Modeling Of Species Distributions, Volker Bahn
Biological Sciences Faculty Publications
Modeling the geographical distributions of wildlife species is important for ecology and conservation biology. Spatial autocorrelation in species distributions poses a problem for distribution modeling because it invalidates the assumption of independence among sample locations. I explored the prevalence and causes of spatial autocorrelation in data from the Breeding Bird Survey, covering the conterminous United States, using Regression Trees, Conditional Autoregressive Regressions (CAR), and the partitioning of variance. I also constructed a simulation model to investigate dispersal as a process contributing to spatial autocorrelation, and attempted to verify the connection between dispersal and spatial autocorrelation in species’ distributions in empirical …
Top-Down Cascade From A Bitrophic Predator In An Old-Field Community, Matthew D. Moran, Thomas P. Rooney, L. E. Hurd
Top-Down Cascade From A Bitrophic Predator In An Old-Field Community, Matthew D. Moran, Thomas P. Rooney, L. E. Hurd
Biological Sciences Faculty Publications
We tested the hypothesis that a bitrophic (third and fourth level) arthropod predator can exert a cascading, top-down influence on other arthropods and plants in an early successional old field. First-stadium mantids, Tenodera sinensis, were added to replicated open-field plots in numbers corresponding to naturally occurring egg hatch density and allowed to remain for ≈ 2 mo. Sticky-trap dispersal barriers around both control and mantid-addition plots allowed us to monitor emigration of arthropods continuously during the experiment. Biomass of herbivores, carnivores, and plants, and abundances of arthropod taxa within plots were determined at the beginning, middle, and end of …