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Effects Of Ocean Warming And Acidification On Rhodolith/Maërl Beds, Sophie Martin, Jason M. Hall-Spencer

School of Biological and Marine Sciences

No abstract provided.

North Atlantic Rhodolith Beds, Jazmin J. Hernandez-Kantun, Jason M. Hall-Spencer, Jacques Grall, Walter Adey, Fabio Rindi, Christine A. Maggs, Ignacio Bárbara, Viviana Peña

School of Biological and Marine Sciences

Aggregations of living unattached corallines, previously often referred to as nodules, were given the name rhodoliths by Bosselini and Ginsburg ( 1971 ). Adey and MacIntyre ( 1973 ) provided an early discussion of their genesis and distribution. Such aggregations have long been known as maerl in the North East Atlantic, a Breton term for unattached thalli that lack a shell or pebble core (Irvine and Chamberlain 1994 ). Here, we provide an overview of rhodolith/maerl occurrence in the colder/temperate waters of the North Atlantic and summarize the distribution, species composition, biodiversity and ecological importance of these habitats.

Effects Of Dredging-Related Pressures On Critical Ecological Processes For Organisms Other Than Fish Or Coral. Report Of Theme 9 - Project 9.1 Prepared For The Dredging Science Node, Jessie Short, Matthew Fraser, Dianne Mclean, Gary Kendrick, Maria Byrne, Julian Caley, Doug Clarke, Andy Davis, Paul Ertemeijer, Stuart Field, Sam Gustin-Craig, John Huisman, John Keesing, Mick Keough, Paul Lavery, Ray Mansini, Kathryn Mcmahon, Kerrie Mergersen, Michael Rasheed, John Statton, Jim Stoddart, Paul Wu

Research outputs 2014 to 2021

This study reviewed environmental windows for organisms other than corals and fish such as sessile invertebrates, macroalgae and seagrasses. Environmental windows are periods of critical importance to the life history of a marine species, like reproduction and recruitment.

Aims

• To review the scientific literature on the timing and spatial extent of critical ecological processes relevant to tropical WA for marine primary producers and invertebrates (i.e. organisms other than coral and finfish) and the state of knowledge regarding potential effects of dredging on these key ecological processes. The review also had a particular focus on ecological processes in marine primary producers …

Historical Reconstructions Of Water Quality In The Kimberley Using Sediment Records. Report Of 2.2.9 Prepared For The Kimberley Marine Research Program, John Keesing, Dongyan Liu, Zineng Yuan, Yajun Peng, Yujue Wang, Pierre Richard, Pere Masque, Yingjun Chen, Yin Fang

Research outputs 2014 to 2021

This project made use of a suite of palaeoecological approaches to reconstruct a chronology of change in coastal water quality over the last approximately 100 years. The biogeochemical proxies addressed phytoplankton composition and biomass, temperature and terrestrial influences. Where possible these were matched to historical land/water use, meteorological or hydrological observational records.

The project examined sediment cores from three coastal locations in the Kimberley region, Koolama Bay (King George River), Cygnet Bay and Roebuck Bay. Each sampling location provided a contrast with which to evaluate changes over either a spatial or temporal gradient of human or natural influences.

Aims

- …

All-Lands Management: Convening Communities And Their Lands Around Fire Management, Jodie T. Pixley

Cal Poly Humboldt theses and projects

Broadly defined, All-lands Management (ALM) is a land management approach involving collaborative, science-based ecosystem restoration at the landscape scale, across ownership and jurisdictional boundaries. My research investigates collaborative groups working to reduce wildfire risk by applying ALM. Fire risk in the Pacific West (California and Oregon) is increasing in severity and extent due to fire suppression and is exacerbated by the effects of drought, climate change, and expanding residential development. For decades federal, state, and local entities have expressed the need to work collaboratively, across boundaries and ownerships to reintroduce fire back onto the landscape to restore forest resiliency. This …

An Exploration Of The Effects Of Cattle Grazing, Prairie Dog Activity, And Ecological Site On Plant Community Composition And Western Wheatgrass Vegetative Reproduction In Northern Mixed Grass Prairie, Aaron Lee Field

Range Science

Modern range scientists and managers are tasked with feeding more people than ever before while maintaining or improving the ecological function of over half of the world’s land surface. Often, these tasks are in conflict. This disparity is evident in the relationship between rangeland livestock producers and black-tailed prairie dogs (Cynomys ludoviciana). Prairie dogs are considered a keystone species and an ecosystem engineer, but they also reduce available forage for livestock. In this disquisition we investigated the dynamic relationship between prairie dog activities and cattle grazing in respect to their combined and separate influences on plant community composition and western …

Foraging Ecology Of Rangeland Bats, Rebecca Therese Trubitt

Range Science

Land-use and land cover changes impact the distribution of landscape features in rangelands and wildlife use of the landscape. To balance the requirements of wildlife groups that respond differently to landscape features, managers need more information on how these species use rangelands. Here, we investigate bat use of rangelands. We investigated the associations between bat activity and landscape features using acoustic monitoring and generalized linear mixed effect models. Trees and open water were positively associated with bat activity. We also investigated bat use of rangeland tree patches using a hierarchical modelling framework to build generalized linear models that included landscape, …

A Biological Comparison Of Two Sites: An Ecological Approach Using Community Ecology Metrics Based On Insect Faunal Composition, Kennedy J. Martin

University Honors Theses

Two natural sites in the Portland urban area, River View Natural Area (RVNA) and Powers Marine Park (PMP), were sampled to assess their insect faunal composition with the intention of determining whether the areas are sufficiently similar ecologically that they could potentially be managed as a single unit. The two areas were compared using community ecology metrics based on their respective invertebrate fauna. The results suggested that RVNA and PMP had statistically different ecological communities. The Shannon Diversity Index for PMP was 0.303, and 0.819 for RVNA. The Horn Index of Community Overlap suggested a 93.46% overlap based on these …

The Relationship Between Concentrations Of Polycyclic Aromatic Hydrocarbons In Moss And Tree Cover In Portland Or, Andrew S. Mautz

University Honors Theses

This study is a spatial analysis of Polycyclic Aromatic Hydrocarbons (PAH) across the Portland Metro area using data collected from samples of moss tissue (Orthotrichum spp.), and an exploration of the relationship between PAH deposition and urban tree canopy in Portland Oregon. PAH are a class of common environmental pollutants created by the incomplete combustion of organic materials; largely via anthropocentric activity. Species of lichens and mosses have been shown to be suitable bioindicators of air pollutants (including PAH contamination) in other studies. Urban tree canopy is known to mitigate other environmental pollutants, as well as provide numerous …

Condition Of Birds In Amazonian Rainforest Fragments And Second-Growth Forests, Angelica Maria Hernandez Palma

LSU Doctoral Dissertations

Deforestation modifies otherwise intact expanses of forest into small, isolated fragments. In addition to fragmentation, deforestation also creates abrupt forest edges and large areas of regenerating vegetation where land is abandoned after clearing. Understanding how changes in the landscape affect the physical condition of birds is crucial for managing populations in human-modified landscapes. Here I use the biomarkers feather growth rate and feather quality (ptilochronology), fluctuating asymmetry (FA), and stress hormones from feathers (CORT), to estimate the physical condition of Amazonian understory birds living in forest fragments, second-growth forests, and continuous forests. Feather CORT revealed how fragmentation disrupts interspecific interactions; …

Human Gut Microbiota And Obesity: How Is Gut Microbiota Associated With Obesity Improvement Induced By Bariatric Surgeries Or Low-Calorie Diet Treatment?, Rui Zhang

LSU Doctoral Dissertations

An increasing number of studies suggest that the complex microbial community of the human gut may have an important role in human health and disease conditions such as obesity and diabetes. However, the causal relationship among gut microbiota, obesity, weight loss, and the influence of bariatric surgery remains largely unknown. This study investigated the correlation between human gut microbiota and obesity via determining how gut microbiota is associated with obesity improvement induced by bariatric surgeries (BRS) and low-calorie diet (LCD) treatment. Specifically, we investigated the effects of various bariatric surgery (BRS) procedures and a low-calorie diet (LCD) treatment on the …