5 results on '"Elevation dynamics"'
Search Results
2. A disconnect between upslope shifts and climate change in an Afrotropical bird community
- Author
-
Montague H. C. Neate‐Clegg, Timothy G. O'Brien, Felix Mulindahabi, and Çağan Hakkı Şekercioğlu
- Subjects
Albertine Rift ,elevation dynamics ,precipitation ,range limits ,temperature ,Ecology ,QH540-549.5 ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Abstract Climate change threatens to push species to higher elevations and eventual extinction. Birds, in particular, are shown to be shifting upslope in the Neotropics and Southeast Asia. Yet previous studies have lacked the temporal resolution to investigate distributional dynamics over time in relation to climatic fluctuations, especially in the understudied Afrotropics. Here, we used 15 years of point‐count data from across an elevational gradient (1,767–2,940 m) in Rwanda, to assess elevational shift rates and dynamics in a community of Afrotropical birds. In general, species shifted their elevations upslope by 1.9 m/year, especially at their lower elevational limits which shifted by 4.4 m/year. Importantly, these shifts occurred despite the fact that local temperature and precipitation showed little trend over the study period. Moreover, the interannual distributions of few species were associated with temperature, suggesting that temperature played little direct role in determining elevational distributions of birds. Instead, upslope shifts may be more related to incremental shifts in habitat and resources which lag behind decades of increased temperature in the region. Precipitation appeared to have more of an effect than temperature in determining interannual elevational changes, allowing species to expand their ranges in years of higher rainfall. Our results highlight the need to understand the mechanisms driving upslope shifts as they occur throughout the tropics. It will be critical for montane regions of the tropics to preserve contiguous blocks of forest across elevational gradients to allow wildlife to shift unimpeded.
- Published
- 2020
- Full Text
- View/download PDF
3. A disconnect between upslope shifts and climate change in an Afrotropical bird community.
- Author
-
Neate‐Clegg, Montague H. C., O'Brien, Timothy G., Mulindahabi, Felix, and Şekercioğlu, Çağan Hakkı
- Subjects
- *
BIRD communities , *CLIMATE change , *METEOROLOGICAL precipitation - Abstract
Climate change threatens to push species to higher elevations and eventual extinction. Birds, in particular, are shown to be shifting upslope in the Neotropics and Southeast Asia. Yet previous studies have lacked the temporal resolution to investigate distributional dynamics over time in relation to climatic fluctuations, especially in the understudied Afrotropics. Here, we used 15 years of point‐count data from across an elevational gradient (1,767–2,940 m) in Rwanda, to assess elevational shift rates and dynamics in a community of Afrotropical birds. In general, species shifted their elevations upslope by 1.9 m/year, especially at their lower elevational limits which shifted by 4.4 m/year. Importantly, these shifts occurred despite the fact that local temperature and precipitation showed little trend over the study period. Moreover, the interannual distributions of few species were associated with temperature, suggesting that temperature played little direct role in determining elevational distributions of birds. Instead, upslope shifts may be more related to incremental shifts in habitat and resources which lag behind decades of increased temperature in the region. Precipitation appeared to have more of an effect than temperature in determining interannual elevational changes, allowing species to expand their ranges in years of higher rainfall. Our results highlight the need to understand the mechanisms driving upslope shifts as they occur throughout the tropics. It will be critical for montane regions of the tropics to preserve contiguous blocks of forest across elevational gradients to allow wildlife to shift unimpeded. Across 15 years of bird count data in Nyungwe National Park, Rwanda, we show that species have shifted their elevations upslope. However, these shifts did not coincide with increases in temperature. There was little association between temperature fluctuations and bird distributions but birds appeared to expand their distributions in wetter years. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
4. A disconnect between upslope shifts and climate change in an Afrotropical bird community
- Author
-
Çağan H. Şekercioğlu, Timothy G. O'Brien, Montague H. C. Neate-Clegg, Felix Mulindahabi, Şekercioğlu, Çağan Hakkı (ORCID 0000-0003-3193-0377 & YÖK ID 327589), Neate-Clegg, Montague H. C., O'Brien, Timothy G., Mulindahabi, Felix, College of Sciences, and Department of Molecular Biology and Genetics
- Subjects
lcsh:QH1-199.5 ,Biology ,Biodiversity conservation ,temperature ,Climate change ,precipitation ,lcsh:General. Including nature conservation, geographical distribution ,Geography ,elevation dynamics ,range limits ,lcsh:QH540-549.5 ,Climatology ,General Earth and Planetary Sciences ,Albertine Rift ,Elevation dynamics ,Precipitation ,Range limits ,Temperature ,lcsh:Ecology ,General Environmental Science - Abstract
Climate change threatens to push species to higher elevations and eventual extinction. Birds, in particular, are shown to be shifting upslope in the Neotropics and Southeast Asia. Yet previous studies have lacked the temporal resolution to investigate distributional dynamics over time in relation to climatic fluctuations, especially in the understudied Afrotropics. Here, we used 15 years of point-count data from across an elevational gradient (1,767-2,940 m) in Rwanda, to assess elevational shift rates and dynamics in a community of Afrotropical birds. In general, species shifted their elevations upslope by 1.9 m/year, especially at their lower elevational limits which shifted by 4.4 m/year. Importantly, these shifts occurred despite the fact that local temperature and precipitation showed little trend over the study period. Moreover, the interannual distributions of few species were associated with temperature, suggesting that temperature played little direct role in determining elevational distributions of birds. Instead, upslope shifts may be more related to incremental shifts in habitat and resources which lag behind decades of increased temperature in the region. Precipitation appeared to have more of an effect than temperature in determining interannual elevational changes, allowing species to expand their ranges in years of higher rainfall. Our results highlight the need to understand the mechanisms driving upslope shifts as they occur throughout the tropics. It will be critical for montane regions of the tropics to preserve contiguous blocks of forest across elevational gradients to allow wildlife to shift unimpeded., University of Utah Graduate Research Fellowship; Wildlife Conservation Society Rwanda Program
- Published
- 2020
5. Organic Matter Dynamics Control Plant Species Coexistence in a Tropical Peat Swamp Forest
- Author
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Shimamura, Tetsuya and Momose, Kuniyasu
- Published
- 2005
- Full Text
- View/download PDF
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