Winter Foraging Ecology of Mixed Insectivorous Bird Flocks in Oak Woodland in Southern Arizona

The Condor ◽  
1972 ◽  
Vol 74 (1) ◽  
pp. 17 ◽  
Author(s):  
George T. Austin ◽  
E. Linwood Smith
Keyword(s):  
Foraging Ecology ◽  
Oak Woodland ◽  
Insectivorous Bird ◽  
Winter Foraging

Winter Foraging Ecology of Moose on Glyphosate-Treated Clearcuts in Maine

1996 ◽  
Vol 60 (4) ◽  
pp. 753 ◽  
Author(s):  
Kevin S. Raymond ◽  
Frederick A. Servello ◽  
Brad Griffith ◽  
William E. Eschholz
Keyword(s):  
Foraging Ecology ◽  
Winter Foraging

scholarly journals Winter foraging ecology of Greater Sage-Grouse in a post-fire landscape

2020 ◽  
Vol 178 ◽  
pp. 104154 ◽  
Author(s):  
Marcella R. Fremgen-Tarantino ◽  
Jacqueline J. Peña ◽  
John W. Connelly ◽  
Jennifer Sorensen Forbey
Keyword(s):  
Foraging Ecology ◽  
Sage Grouse ◽  
Winter Foraging

scholarly journals Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems

2018 ◽  
Vol 8 (5) ◽  
pp. 2752-2765 ◽  
Author(s):  
Yves Cherel ◽  
Charline Parenteau ◽  
Paco Bustamante ◽  
Charles-André Bost
Keyword(s):  
Stable Isotopes ◽  
Foraging Ecology ◽  
Winter Foraging

Winter Foraging Ecology of Bald Eagles in Arizona

The Condor ◽  
1993 ◽  
Vol 95 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Bryan T. Brown
Keyword(s):  
Foraging Ecology ◽  
Bald Eagles ◽  
Winter Foraging

scholarly journals Do insectivorous bird communities decline on land-bridge forest islands in Peninsular Malaysia?

2010 ◽  
Vol 27 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Ding Li Yong ◽  
Lan Qie ◽  
Navjot S. Sodhi ◽  
Lian Pin Koh ◽  
Kelvin S.-H. Peh ◽  
...  
Keyword(s):  
Species Richness ◽  
Foraging Ecology ◽  
Peninsular Malaysia ◽  
Theoretic Approach ◽  
Insectivorous Birds ◽  
Land Bridge ◽  
Lowland Forest ◽  
Insectivorous Bird ◽  
The Impact ◽  
Forest Islands

Abstract:To assess the impact of habitat fragmentation on tropical avian communities, we sampled lowland forest birds on six land-bridge islands and two mainland forest sites in Lake Kenyir, Peninsular Malaysia using timed point counts, hypothesizing that insectivorous birds are the worst affected guild. We used an information-theoretic approach to evaluate the effects of area, isolation, primary dietary guild (omnivore, frugivore and insectivore) and their interactions in predicting species richness, abundance and diversity. Our analysis showed that a model that considered the effects of area, dietary guild and their interaction best explained observed patterns of species richness. But a model considering both area and dietary guild best explained the variation in abundance. Notably, insectivorous birds were singled out as the dietary guild most sensitive to fragmentation, followed by frugivorous and omnivorous birds and hence provide support for our hypothesis. Assemblages of insectivorous birds were clearly depauperate on anthropogenic forest islands in Lake Kenyir and are consistent with forest fragmentation studies in the Neotropics. Given their specialized foraging ecology and diversity, conservation of intact communities of insectivorous bird guilds in Malaysia will be critical for maintaining predator–prey interactions in lowland tropical forests.

Winter Foraging Ecology of Woodland Caribou in Northeastern Washington

1996 ◽  
Vol 60 (4) ◽  
pp. 719 ◽  
Author(s):  
Eric M. Rominger ◽  
Charles T. Robbins ◽  
Marc A. Evans
Keyword(s):  
Foraging Ecology ◽  
Woodland Caribou ◽  
Winter Foraging

Range shift and winter foraging ecology of a population of Arctic tundra caribou

2001 ◽  
Vol 79 (5) ◽  
pp. 746-758 ◽  
Author(s):  
Michael AD Ferguson ◽  
Line Gauthier ◽  
François Messier
Keyword(s):  
Rangifer Tarandus ◽  
Foraging Ecology ◽  
Food Selection ◽  
Arctic Tundra ◽  
High Arctic ◽  
Range Shift ◽  
Winter Range ◽  
Cassiope Tetragona ◽  
Winter Foraging

Some researchers have suggested that over periods of several decades, Arctic tundra caribou (Rangifer tarandus) may be regulated by density-dependent forage depletion. Winter range shifts could potentially delay such regulation when a population is at or near long-term maximum abundance. In the 1980s, Inuit correctly predicted the mass emigration of caribou from a traditional winter range on Foxe Peninsula (FP) on southern Baffin Island, Nunavut, Canada. Most FP caribou subsequently emigrated to a new winter range on Meta Incognita Peninsula (MIP). To determine if MIP provided emigrating caribou with better foraging habitats, we compared winter forage resources and snow cover at caribou foraging sites, and food selection by caribou on FP and MIP in April 1992. Caribou that remained on FP dug feeding craters in shallower, softer snow than those on MIP did. Biomass of most fruticose lichens was greater within foraging sites on MIP than on FP. Biomass of shrubs, other than Cassiope tetragona and Dryas integrifolia, was also greater on MIP than on FP. Dryas integrifolia was the only plant class that had higher biomass on FP than on MIP. Cladina spp. / Cladonia spp., Sphaerophorus fragilis, and Cetraria nivalis occurred less frequently in the rumens of FP caribou. Proportions of fruticose lichens in rumens of caribou on both peninsulas were similar to those on other overgrazed and High Arctic tundra winter ranges. Caribou on FP showed a higher preference for the shrub C. tetragona. Biomasses of plants sensitive to long-term feeding or trampling by caribou (i.e., the five most common fruticose lichens, other shrubs, and plant debris) were consistently lower on FP, which is congruous with Inuit reports that long-term cumulative overgrazing had reduced the supply of important forage plants on FP sites that were accessible to caribou in winter. FP caribou that emigrated to MIP gained access to more abundant, higher quality forage resources than those that remained on FP. Because most FP caribou had emigrated, this South Baffin subpopulation escaped, at least temporarily, the regulating effects of historical cumulative overgrazing.

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