Filters: Tags: body size (X) > Extensions: Citation (X)
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Aim The influence of anthropogenic climate change on organisms is an area of great scientific concern. Increasingly there is recognition that abrupt climate transitions have occurred over the late Quaternary; studies of these shifts may yield insights into likely biotic responses to contemporary warming. Here, we review research undertaken over the past decade investigating the response of Neotoma (woodrats) body size and distribution to climate change over the late Quaternary (the last 40,000 years). By integrating information from woodrat palaeomiddens, historical museum specimens and field studies of modern populations, we identify potential evolutionary responses to climate change occurring over a variety of...
Categories: Publication;
Types: Citation;
Tags: adaptation,
body size,
evolutionary change,
global climate change,
late Quaternary,
From 1988-1991, I studied desert rodent communities of the Canyon Country Province, Colorado Plateau. Study areas were located in Capitol Reef National Park, Utah and represented grassland, shrubland, and woodland habitats. I examined species richness, guild structure, body size, and microhabitat use, testing predictions based on patterns documented in other North American desert rodent faunas. Rodent assemblages were relatively simple with respect to species richness and number of taxonomic/foraging guilds. Among coexisting species, only the numerically dominant omnivores exhibited non-random body size. Co-occurences of species representing three taxonomic-foraging guilds were significantly different from expected...
Categories: Publication;
Types: Citation,
Conference Citation;
Tags: Body size,
National Park Service,
community structure,
desert rodents,
microhabitat
Macroecology is a big-picture, statistical approach to the study of ecology. By focusing on broadly occurring patterns and processes operating at large spatial and temporal scales and ignoring localized and fine-scaled details, macroecology aims to uncover general mechanisms operating at organism, population and ecosystem levels of organization. Although such an approach is evident in writings dating from the mid- to late 1800s, not until 1989 was the domain of macroecology clearly articulated. Since then there has been an exponential growth in publications employing a macroecological perspective. Here we (1) briefly review the history of macroecology, with emphasis on cultural, scientific and technological innovations...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Progress in Physical Geography,
abundance,
biogeography,
body size,
metabolic theory,
We examined survival rates of mule deer (Odocoileus hemnionus) fawns (1 Jan-31 May) and adult (21 yr old) females (1 Jun-31 May) from Colorado, Idaho, and Montana to assess the influence of survival on population dynamics over a broad geographic area. Survival rates were estimated from 1,875 radiocollared fawns and 1,536 radiocollared adult female-years. We found significant year-to-year differences in overwinter survival rates of fawns among states (P < 0.001), while annual survival rates of adult females showed less variation across years (P < 0.256). Sampling distributions of survival rates bv age class were modeled with the beta-binomial distribution (BBD) and not found different among states (ad F: P = 0.118;...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Colorado,
Idaho,
Montana,
Odocoileus hemionus,
The Journal of Wildlife Management,
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