scholarly journals A multi-scale study of the relationships between habitat use and the distribution and abundance patterns of three coral reef angelfishes (Pomacanthidae)

2001 ◽  
Vol 214 ◽  
pp. 253-265 ◽  
Author(s):  
JV Eagle ◽  
GP Jones ◽  
MI McCormick
Keyword(s):  
Coral Reef ◽  
Habitat Use ◽  
Multi Scale ◽  
Abundance Patterns

scholarly journals Human-induced physical disturbances and their indicators on coral reef habitats: A multi-scale approach

2005 ◽  
Vol 18 (3) ◽  
pp. 215-230 ◽  
Author(s):  
Pascale Chabanet ◽  
Mehdi Adjeroud ◽  
Serge Andréfouët ◽  
Yves-Marie Bozec ◽  
Jocelyne Ferraris ◽  
...  
Keyword(s):  
Coral Reef ◽  
Multi Scale

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.

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.

scholarly journals A contemporary baseline record of the world’s coral reefs

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Alberto Rodriguez-Ramirez ◽  
Manuel González-Rivero ◽  
Oscar Beijbom ◽  
Christophe Bailhache ◽  
Pim Bongaerts ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Significant Contribution ◽  
Taxonomic Resolution ◽  
Spatially Explicit ◽  
Multi Scale ◽  
Tropical Coral ◽  
Before And After ◽  
Tropical Coral Reef ◽  
Proportional Cover

Abstract Addressing the global decline of coral reefs requires effective actions from managers, policymakers and society as a whole. Coral reef scientists are therefore challenged with the task of providing prompt and relevant inputs for science-based decision-making. Here, we provide a baseline dataset, covering 1300 km of tropical coral reef habitats globally, and comprised of over one million geo-referenced, high-resolution photo-quadrats analysed using artificial intelligence to automatically estimate the proportional cover of benthic components. The dataset contains information on five major reef regions, and spans 2012–2018, including surveys before and after the 2016 global bleaching event. The taxonomic resolution attained by image analysis, as well as the spatially explicit nature of the images, allow for multi-scale spatial analyses, temporal assessments (decline and recovery), and serve for supporting image recognition developments. This standardised dataset across broad geographies offers a significant contribution towards a sound baseline for advancing our understanding of coral reef ecology and thereby taking collective and informed actions to mitigate catastrophic losses in coral reefs worldwide.

scholarly journals Multi-scale path-level analysis of jaguar habitat use in the Pantanal ecosystem

2021 ◽  
Vol 253 ◽  
pp. 108900
Author(s):  
Guilherme Costa Alvarenga ◽  
Luca Chiaverini ◽  
Samuel A. Cushman ◽  
Egil Dröge ◽  
David W. Macdonald ◽  
...  
Keyword(s):  
Habitat Use ◽  
Multi Scale ◽  
Level Analysis
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