Allison Pease

Allison Pease
University of Missouri | Mizzou · School of Natural Resources

Ph.D. 2010 Texas A&M

About

32
Publications
6,024
Reads
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553
Citations
Additional affiliations
January 2018 - April 2018
Texas Tech University
Position
  • Professor (Associate)
August 2012 - present
Texas Tech University
Position
  • Professor (Assistant)
August 2010 - August 2012
University of Missouri
Position
  • PostDoc Position

Publications

Publications (32)
Article
We used stable isotope analysis to investigate differences in Guadalupe bass (Micropterus treculii) resource use that might be associated with population‐level variation in mainstem river versus tributary stream habitats. Guadalupe bass from mainstem sites had higher δ13C and δ15N values compared to those collected in tributaries, likely reflecting...
Article
Full-text available
Species conservation requires a clear understanding of habitat availability and subsequent use of those habitats. In cases where species declines have occurred and gone undetected by conservation managers , habitat alteration, fragmentation, and loss are often the largest contributors. River fragmentation often results in altered flow regimes, subs...
Article
Full-text available
Alteration of flow regimes by anthropogenic activities is one of the primary environmental problems in riverine systems. Understanding how hydrologic conditions can affect ontogenetic habitat shifts of imperiled fishes is important in order to develop conservation and management strategies for each life-history stage. We examined relationships betw...
Article
Environmental changes caused by hydrological shifts between wet and dry seasons in the tropics drive variation in resource availability and feeding interactions for riverine fish assemblages, but studies of trophic structure typically take place over short time scales that do not adequately capture this variation. In this study, we used stable isot...
Article
During adaptive radiation, diversification within clades is limited by adaptation to the available ecological niches, and this may drive patterns of both trait and species diversity. However, adaptation to disparate niches may result in varied impacts on the timing, pattern and rate of morphological evolution. In this study, we examined the relatio...
Article
Full-text available
Sedimentation in aging reservoirs generally reduces fish habitat quality and quantity, often isolating coves and pools from the main body of the reservoir. In some cases, however, habitat fragments created by sediment deposition in the river-reservoir interface zone support high fish diversity, and they could potentially replicate features of nurse...
Article
Assessments of trophic diversity are critical for evaluating ecological integrity of habitats, but interpretations of such assessments require an understanding of variation across natural environmental gradients. This can be problematic when comparing structure of assemblages in under-studied regions or habitats, such as watersheds in dry tropical...
Poster
Full-text available
The Naked Goby, Gobiosoma bosc, is an estuarine species that has become established in inland freshwaters in Texas, namely in the Colorado River basin and San Antonio River basin. While G. bosc has been studied throughout its native distribution, very little is known about the ecology of the species in invaded habitats. We examined the resource use...
Poster
Full-text available
The historical focus of research on temperate freshwater systems has resulted in a large data gap in the tropics, particularly in Afrotropical regions. As most conceptual models have been developed in temperate systems, their applicability to Afrotropical waters is uncertain. The aim of this study is to use trait and diversity information from fres...
Article
Full-text available
Understanding the degree of intraspecific variation within and among populations is a key aspect of predicting the capacity of a species to respond to anthropogenic disturbances. However, intraspecific variation is usually assessed at either limited temporal, but broad spatial scales or vice versa, which can make assessing changes in response to lo...
Article
Full-text available
Fish assemblages in tropical lowland rivers are characterized by a high richness of species that feed on a diverse array of food resources. Although closely related species often have similar feeding ecology, species within the family Cichlidae display a broad spectrum of trophic niches, and resource partitioning has been inferred from studies cond...
Article
As human population densities grow around the boundaries of protected areas in lower-income economies, there are frequently concomitant increases in environmental degradation. The purpose of this study was to examine water chemistry and the isotopic signatures of primary consumers in streams in and around a national park in the tropics to document...
Article
1. Very little is known about the ecosystem impacts of river salinization despite expectations for global increases in salinization with growing water demand and climate change. In some rivers in the southwestern United States, salinization has occurred as a result of natural saline inputs exacerbated by flow alteration and other anthropogenic impa...
Article
Gulf killifish, Fundulus grandis, have been introduced in the Lower Pecos River and are highly abundant in reaches of the Permian Basin region. Very little is known about the ecology of nonnative, inland populations of F. grandis. We investigated the feeding ecology of this species in the Pecos River using stomach contents analysis and laboratory f...
Article
Full-text available
Patterns of association between functional traits and environmental gradients can improve understanding of species assemblage structure from local to regional scales, and therefore may be useful for natural resource management. We measured functional traits related to trophic ecology, habitat use, and life-history strategies of fishes and examined...
Conference Paper
The taxonomic and functional structure of stream assemblages is expected to vary with changes in multi-scale environmental variables along longitudinal fluvial gradients. In some cases, fishes and stream macroinvertebrates have been shown to respond to environmental factors at different scales. We sought to examine variation in both assemblages acr...
Conference Paper
Anthropogenic influences have been shown to disrupt natural longitudinal patterns in riverine food-web structure. The Pecos River is impacted by threats common in semi-arid regions including increased salinity, diminished discharge, altered flow regime, and conversion of watershed land for human uses. We used stable isotope analysis to characterize...
Conference Paper
The Zebra Mussel continues to expand its range across North America despite varied efforts at containment and apparent physicochemical barriers. Early research had suggested that high water temperatures would prevent their spread and establishment in Texas. However new records in the reservoirs of the Trinity and Brazos River Basins in northern Tex...
Article
Smallmouth bass (Micropterus dolomieu, SMB) is a broadly distributed, economically important species in the USA and Canada. Although previous research has suggested that projected climate warming may allow SMB to thrive beyond their current northern distribution, little research has been devoted to the population-level effects of climate change on...
Article
Full-text available
Anthropogenic inputs of nitrogen (N) and phosphorus (P) create environmental conditions that alter biological organisation and ecosystem functioning in fresh waters. We studied 38 wadeable streams spanning a N and P gradient to contrast responses of algal and fish assemblages to nutrient enrichment. Surface water total P (TP) and total N (TN) conce...
Conference Paper
We examined the population-level impacts of projected climate change on stream-dwelling smallmouth bass (Micropterus dolomieu, SMB) along a north-south gradient in the central U.S. Using down-scaled regional climate projections from three global climate models, we generated scenarios for thermal habitat change for four populations ranging from the...
Article
Full-text available
1. The species composition of stream fish assemblages changes across the longitudinal fluvial gradient of large river basins. These changes may reflect both zonation in species distributions and environmental filtering of fish traits as stream environments change from the uplands to the lowlands of large catchments. Previous research has shown that...
Conference Paper
Smallmouth bass (Micropterus dolomieu, SMB) is a widespread species with broad distribution throughout the eastern and central U.S. and introduced populations in many regions beyond its native range. Prior studies have shown that SMB distribution is expected to shift with predicted changes in climate, but little is known about how these changes wil...
Article
Full-text available
We investigated the influences of local and landscape-scale environmental variables on fish assemblage structure among 64 stream reaches in two large river basins in central Texas. The broad spatial extent of this study region provided an opportunity to examine fish assemblage–environment relationships at multiple scales across a range of stream ty...
Conference Paper
Background/Question/Methods Understanding how environmental variables at multiple scales influence the structure of stream fish assemblages is important for habitat assessment, stream restoration, and for predicting responses to environmental change. A focus on the functional structure of species assemblages in relation to environmental gradients...
Article
Ecosystem processes and biological community structure are expected to change in a relatively predictable manner along fluvial gradients within river basins. Such predictions are heavily based on temperate rivers, and food web variation along fluvial gradients in Mesoamerican rivers has received limited attention. In this study, we analyzed carbon...
Conference Paper
Background/Question/Methods An emerging view in community ecology is that a focus on functional traits as they relate to environmental gradients can reveal general patterns and improve our ability to predict responses of communities to environmental change. In this study, we applied such an approach to examine fish assemblages across a range of st...
Article
1. Studies of mesic temperate and tropical rivers suggest an important role for floodplain habitats as nursery areas for larval and juvenile fishes. In arid-land rivers the extent and duration of flooding is diminished and habitats and resources used by larval fishes are poorly known. Our study documented habitat and resource use of larval fishes i...
Article
The distribution and abundance of stream fishes are influenced by many factors operating at multiple scales. Understanding how environmental variables influence the structure of stream fish assemblages is important for habitat assessment, stream restoration, and for predicting responses to environmental change. An emerging view in community ecology...

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Projects

Projects (2)
Project
The majority of the conceptual models and research methods available for lotic freshwater systems were developed in non-pristine temperate systems, and their applicability to tropical waters is uncertain.The majority of existing information on tropical streams is mostly from the Neotropics and Australasia, but data from the Afrotropics is sparse for various reasons including political instability, geographical inaccessibility and poor dissemination of local research. The research project aims to address part of this identified problem by using functional trait and isotope ratio methods to characterise the functional ecology and environmental drivers of lotic community ecology in Afrotropical streams in the Republic of Congo, west-central Africa. The research project will test selected contemporary lotic conceptual frameworks that are routinely assumed in the functioning of these systems. The study will make use of an existing freshwater ecology data set to inform and complement field surveys designed to test the conformity of selected models in the Afrotropical study area. The outcome of the characterisation will allow us to review requirements for region specific models and freshwater management.