Anne M. McLeod

Anne M. McLeod
University of Canterbury | UC · School of Biological Sciences

Doctor of Philosophy

About

21
Publications
4,070
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183
Citations
Citations since 2017
11 Research Items
159 Citations
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201720182019202020212022202301020304050

Publications

Publications (21)
Article
Full-text available
Larger geographical areas contain more species—an observation raised to a law in ecology. Less explored is whether biodiversity changes are accompanied by a modification of interaction networks. We use data from 32 spatial interaction networks from different ecosystems to analyse how network structure changes with area. We find that basic community...
Article
Full-text available
Collecting well-resolved empirical trophic networks requires significant time, money and expertise, yet we are still lacking knowledge on how sampling effort and bias impact the estimation of network structure. Filling this gap is a critical first step towards creating accurate representations of ecological networks and for teasing apart the impact...
Article
Communities can be described by species, interactions and the network of interactions which emerge from these building blocks. Networks are often summarized by diverse metrics which capture key components of network topology, for example, number of trophic levels, number of interactions per species (i.e. degree) and frequency of apparent competitio...
Article
Local dynamics are influenced by regional processes. Meta‐ecology, or the study of spatial flows of energy, materials, and species between local systems is becoming increasingly concerned with accurate depictions of species movements and the impacts of this movement on landscape‐level ecosystem function. Indeed, incorporating diverse types of movem...
Article
The persistence of whole communities hinges on the presence of select interactions which act to stabilize communities making the identification of these keystone interactions critical. One potential candidate is omnivory, yet theoretical research on omnivory thus far has been dominated by a modular theory approach whereby an omnivore and consumer c...
Article
The Three Gorges Reservoir (TGR), China, is the largest man-made reservoir in the world. Harmful algal blooms (HABs) have become common since the reservoir’s impoundment in 2003. To investigate the mechanisms of HAB formation in the reservoir and to determine possible mitigation measures, we conducted surveys over a range of spatial scales and temp...
Article
Accurate trophic position (TP) estimates are important for the development of ecosystem-based management plans. TPs can be quantified by carbon (δ¹³C) and nitrogen (δ¹⁵N) stable isotopes in tissues, but these can disagree with observed and perceived feeding ecology. A recent method that has used a scaled diet-tissue discrimination factor (DTDF), re...
Article
Full-text available
Understanding drivers of antagonistic interactions across temporal and spatial scales is important for predicting community structure. In particular, studies examining spatial variation in ecological networks are critical for anticipating community responses to anthropogenic change. Most studies examining spatial interaction turnover focus on bipar...
Article
This study applied and tested a bioenergetic‐based, steady‐state food web bioaccumulation model to predict polychlorinated biphenyl (PCB) exposures in sport fish of the Detroit River, which is a Great Lakes “area of concern” (AOC). The PCB concentrations in the sediment and water of the river were found to exhibit high spatial variation. The previo...
Article
Lake ecosystems are threatened by an array of stressors. To understand how food webs and bioaccumulation dynamics respond to these challenges requires the quantification of energy flow. Here, we present a combined, multi‐tracer approach using both polychlorinated biphenyls (PCBs) and stable isotopes to trace energy flow, and to quantify how lake tr...
Article
Full-text available
Contaminant remediation decisions often focus on sediment‐organism relationships, omitting the partitioning between sediment and water that exists across a given site. The present study highlights the importance of incorporating non‐sedimentary routes of exposure into a non‐equilibrium, steady‐state food web bioaccumulation model for predicting pol...
Article
Accurate predictions on the bioaccumulation of persistent organic pollutants (POPs) are critical for hazard and ecosystem health assessments. Aquatic systems are influenced by multiple stressors including climate change and species invasions and it is important to be able to predict variability in POP concentrations in changing environments. Curren...
Article
Standard metabolic rates (SMR) were measured in brown bullheads (Ameiurus nebulosus) collected from two locations of the Detroit River, North America, representative of highly contaminated and uncontaminated areas. Measurements of SMR were completed within 10 days of fish collections (acute trials), for fish held in a common pond environment for 1...
Article
Measuring in situ nutrient and energy flows in spatially and temporally complex aquatic ecosystems represents a major ecological challenge. Food web structure, energy and nutrient budgets are difficult to measure, and it is becoming more important to quantify both energy and nutrient flow to determine how food web processes and structure are being...
Article
Trophic position (TP) and body mass are traits commonly used to predict organochlorine (OC) burdens. Sharks, however, have a variety of feeding and life-history strategies, and metabolize lipid uniquely. Because of this diversity, and the lipid-association of OCs, the dynamics of OC accumulation in sharks may be ineffectively predicted by stable is...
Article
Full-text available
Understanding the response of organisms to multiple stressors is critical for predicting if populations can adapt to rapid environmental change. Natural and anthropogenic stressors often interact, complicating general predictions. In this study, we examined the interactive and cumulative effects of two common environmental stressors, lowered calciu...
Article
Understanding factors influencing mercury (Hg) bioaccumulation in fish is important for examining both ecosystem and human health. However, little is known of how differing ecosystem and biological characteristics can drive Hg bioaccumulation in top predators. This study compared and contrasted Hg bioaccumulation in multiple age classes of lake tro...
Article
Trophic magnification factors (TMFs) provide a method of assessing chemical biomagnification in food webs and are increasingly being used by policy makers to screen emergent chemicals. Recent reviews have encouraged the use of bioaccumulation models as screening tools for assessing TMFs for emergent chemicals of concern. The present study used a fo...
Article
Understanding variability of contaminant bioaccumulation within and among fish populations is critical for distinguishing between the chemical and biological mechanisms that contribute to food web biomagnification and quantifying contaminant exposure risks in aquatic ecosystems. The present study examined the relative contributions of chemical hydr...
Article
Bluegill sunfish were caged in the Detroit River, Ontario, Canada, for 64 days to determine bioaccumulation rates of PCBs. Deployments involved placing fish in cages suspended in the water (suspended cages) compared to cages partially buried in sediments. Deployments were performed in the summer and winter months. During summer, fish exhibited sign...

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