Multi-Scale Foraging Habitat Use and Interactions by Sympatric Cervids in Northeastern China

2010 ◽  
Vol 74 (4) ◽  
pp. 678-689 ◽  
Author(s):  
Guangshun Jiang ◽  
Jianzhang Ma ◽  
Minghai Zhang ◽  
Philip Stott
Keyword(s):  
Habitat Use ◽  
Northeastern China ◽  
Foraging Habitat ◽  
Multi Scale

Habitat use by the eastern horseshoe bat, Rhinolophus megaphyllus, in a fragmented woodland mosaic

1998 ◽  
Vol 25 (5) ◽  
pp. 489 ◽  
Author(s):  
Chris R. Pavey
Keyword(s):  
Habitat Use ◽  
Auditory System ◽  
The Other ◽  
Foraging Habitat ◽  
Flight Pattern ◽  
Edge Habitat ◽  
Open Ground ◽  
Horseshoe Bat ◽  
Horseshoe Bats ◽  
Riparian Woodland

I examined habitat use by eastern horseshoe bats, Rhinolophus megaphyllus, in a fragmented woodland mosaic in south-east Queensland, Australia. I predicted that the species would forage within the remaining woodland remnants in the mosaic, because its flight pattern and auditory system are adapted for locating and capturing prey in cluttered habitat (i.e. close to and within vegetation). I studied habitat use by light-tagging and radio-tagging bats that roosted in a disused mine in a large woodland fragment. I observed bats within an area of 95 ha, which was composed of grassland (71% of area), woodland (14%), and edge habitat (boundary of woodland and grassland, and isolated trees in grassland – 15%). Bats foraged in woodland and edge habitat but not over grassland, and used woodland significantly more often than expected by its availability. Commuting bats left the woodland fragment in which the roost was located by one of two routes, both of which led into riparian woodland. One route was entirely within woodland, whereas the other route crossed 250 m of open ground. The study indicates that R. megaphyllus should respond negatively to the fragmentation of woodland and forest because this process will reduce the availability of its preferred foraging habitat.

scholarly journals Multi-scale habitat use analysis and interspecific Ecology of the Critically Endangered Black-breasted Puffleg Eriocnemis nigrivestis

2015 ◽  
Vol 25 (4) ◽  
pp. 479-488 ◽  
Author(s):  
ESTEBAN A. GUEVARA ◽  
ELISA BONACCORSO ◽  
JOOST F. DUIVENVOORDEN
Keyword(s):  
Habitat Use ◽  
Habitat Degradation ◽  
Physiological Stress ◽  
Selection Process ◽  
Habitat Model ◽  
Critically Endangered ◽  
Use Patterns ◽  
Multi Scale ◽  
The North ◽  
Competition Hypothesis

SummaryThe Black-breasted Puffleg Eriocnemis nigrivestis is a hummingbird endemic to Ecuador and considered Critically Endangered, given its limited distribution, low population numbers, and ongoing habitat degradation. We investigated habitat use patterns using landscape and microhabitat variables. In addition, we explored a previously postulated competition hypothesis involving the Black-breasted Puffleg and the Gorgeted Sunangel Heliangelus strophianus. Our results suggest that landscape variables may play a role in the habitat selection process; specifically the distance to nearest forest border seems to have a significant effect on our habitat model. We speculate that, as the species is known to perform seasonal movements, the avoidance of forest border might reduce the physiological stress caused by altitudinal migration. At microhabitat level, Black-breasted Puffleg seems not sensitive to forest structure variables. Our findings suggest that ensuring forest tract connectivity, between the altitudinal extremes of the species’ range at the north-western flanks of the Pichincha volcano, might be crucial for survival of the species during its annual cycle. However, non-metric multidimensional scaling (NMDS) indicates that Black-breasted Puffleg and the Gorgeted Sunangel do not overlap spatially, but this finding is not conclusive considering our field observations.

Implications of forest management practices for sex-specific habitat use by Nycticeius humeralis

2019 ◽  
Vol 100 (4) ◽  
pp. 1263-1273
Author(s):  
Youngsang Kwon ◽  
Anna C Doty ◽  
Megan L Huffman ◽  
Virginie Rolland ◽  
Daniel R Istvanko ◽  
...  
Keyword(s):  
Forest Management ◽  
Habitat Use ◽  
Vegetation Index ◽  
Management Practices ◽  
Anthropogenic Impacts ◽  
Suitable Habitat ◽  
Foraging Habitat ◽  
Landscape Characteristics ◽  
Wide Range ◽  
Probability Of Presence

AbstractNorth American bats are experiencing declines in part due to anthropogenic impacts resulting in habitat loss and disturbance. In eastern deciduous forests, bats rely on forest resources for all or part of the year. Therefore, to promote conservation of bats, it is essential to determine whether current forest management techniques are compatible with habitat use by bats. We evaluated the relative effect of landscape characteristics, including forest management variables, on sex-specific foraging habitat of an insectivorous forest-dwelling bat species, the evening bat (Nycticeius humeralis), and predicted areas of suitable habitat for N. humeralis. A total of 18 variables were assessed using a maximum-entropy (Maxent) machine-learning approach: eight land use–land cover classes, three stand types, two topography measures, normalized difference vegetation index, and four forest management variables. Females showed the highest probability of presence closer to stands treated with prescribed fire, whereas males showed the highest probability of presence closer to reforested stands. In general, males exhibited more flexibility than females in their habitat selection. The Maxent model further indicated that habitat associated with suitability of > 70% was ~4 times larger for males than females, and predicted an additional area of suitable foraging habitat where no presence locations had been recorded. Our modeling approach may be suitable for other researchers to derive models appropriate for a wide range of bat species.

scholarly journals Foraging Success and Foraging Habitat Use by Cattle Egrets and Little Egrets in the Camargue, France

The Condor ◽  
2001 ◽  
Vol 103 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Katia Lombardini ◽  
Robert E. Bennetts ◽  
Christophe Tourenq
Keyword(s):  
Habitat Use ◽  
Habitat Type ◽  
Foraging Success ◽  
Foraging Habitat ◽  
Mixed Species ◽  
Habitat Types ◽  
Southern France ◽  
Bubulcus Ibis ◽  
Egretta Garzetta ◽  
Selection Of

Abstract We examined habitat use by Little Egrets (Egretta garzetta) and Cattle Egrets (Bubulcus ibis) that nest together in mixed-species colonies in the Camargue of southern France. We explored the relative use of seven habitat types in relation to their availability and tested the hypothesis that selection of habitat types was related to foraging success, with the prediction that increased foraging success in a given habitat corresponded with increased use of that habitat type. Ricefields and other agricultural habitats were used more than expected by Cattle Egrets, an invasive species in southern Europe; whereas Little Egrets, which are native to the Camargue, tended to select natural freshwater marshes and lagoons. Results were consistent with the hypothesis that increasing use of habitats corresponded with higher foraging success for both species. However, when this analysis was restricted to habitats with sufficient numbers of birds to enable estimates of biomass intake, the association was no longer apparent for Little Egrets.

scholarly journals Multi-scale analysis to uncover habitat use of red-crowned cranes: Implications for conservation

2013 ◽  
Vol 59 (5) ◽  
pp. 604-617 ◽  
Author(s):  
Chunyue Liu ◽  
Hongxing Jiang ◽  
Shuqing Zhang ◽  
Chunrong Li ◽  
Yunqiu Hou ◽  
...  
Keyword(s):  
Habitat Use ◽  
Positive Impact ◽  
Spatial Scales ◽  
Paddy Fields ◽  
Natural Habitats ◽  
Multi Scale ◽  
Aquaculture Ponds ◽  
Natural Wetlands ◽  
Percent Area ◽  
Area Percentage

Abstract A multi-scale approach is essential to assess the factors that limit avian habitat use. Numerous studies have examined habitat use by the red-crowned crane, but integrated multi-scale habitat use information is lacking. We evaluated the effects of several habitat variables quantified across many spatial scales on crane use and abundance in two periods (2000 and 2009) at Yancheng National Nature Reserve, China. The natural wetlands decreased in area by 30,601 ha (-6.9%) from 2000 to 2009, predominantly as a result of conversion to aquaculture ponds and farmland, and the remaining was under degradation due to expansion of the exotic smooth cordgrass. The cranes are focusing in on either larger patches or those that are in close proximity to each other in both years, but occupied patches had smaller size, less proximity and more regular boundaries in 2009. At landscape scales, the area percentage of common seepweed, reed ponds and paddy fields had a greater positive impact on crane presence than the area percentage of aquaculture ponds. The cranes were more abundant in patches that had a greater percent area of common seepweed and reed ponds, while the percent area of paddy fields was inversely related to crane abundance in 2009 due to changing agricultural practices. In 2009, cranes tended to use less fragmented plots in natural wetlands and more fragmented plots in anthropogenic paddy fields, which were largely associated with the huge loss and degradation of natural habitats between the two years. Management should focus on restoration of large patches of natural wetlands, and formation of a relatively stable area of large paddy field and reed pond to mitigate the loss of natural wetlands.

Habitat Use and Foraging Patterns of Molting Male Long-tailed Ducks in Lagoons of the Central Beaufort Sea, Alaska

ARCTIC ◽  
2016 ◽  
Vol 69 (1) ◽  
pp. 19
Author(s):  
Paul L. Flint ◽  
John A. Reed ◽  
Deborah L. Lacroix ◽  
Richard B. Lanctot
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Beaufort Sea ◽  
Home Range Size ◽  
Oil Field ◽  
Range Size ◽  
Foraging Habitat ◽  
Field Development ◽  
Industrial Oil ◽  
Radio Transmitters

From mid-July through September, 10 000 to 30 000 Long-tailed Ducks (<em>Clangula hyemalis</em>) use the lagoon systems of the central Beaufort Sea for remigial molt. Little is known about their foraging behavior and patterns of habitat use during this flightless period. We used radio transmitters to track male Long-tailed Ducks through the molt period from 2000 to 2002 in three lagoons: one adjacent to industrial oil field development and activity and two in areas without industrial activity. We found that an index to time spent foraging generally increased through the molt period. Foraging, habitat use, and home range size showed similar patterns, but those patterns were highly variable among lagoons and across years. Even with continuous daylight during the study period, birds tended to use offshore areas during the day for feeding and roosted in protected nearshore waters at night. We suspect that variability in behaviors associated with foraging, habitat use, and home range size are likely influenced by availability of invertebrate prey. Proximity to oil field activity did not appear to affect foraging behaviors of molting Long-tailed Ducks.

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