scholarly journals Ecological Correlates of Elevational Range Shifts in Tropical Birds

2021 ◽  
Vol 9 ◽  
Author(s):  
Montague H. C. Neate-Clegg ◽  
Samuel E. I. Jones ◽  
Joseph A. Tobias ◽  
William D. Newmark ◽  
Çaǧan H. Şekercioǧlu

Globally, birds have been shown to respond to climate change by shifting their elevational distributions. This phenomenon is especially prevalent in the tropics, where elevational gradients are often hotspots of diversity and endemism. Empirical evidence has suggested that elevational range shifts are far from uniform across species, varying greatly in the direction (upslope vs. downslope) and rate of change (speed of elevational shift). However, little is known about the drivers of these variable responses to climate change, limiting our ability to accurately project changes in the future. Here, we compile empirical estimates of elevational shift rates (m/yr) for 421 bird species from eight study sites across the tropics. On average, species shifted their mean elevations upslope by 1.63 ± 0.30 m/yr, their upper limits by 1.62 m ± 0.38 m/yr, and their lower limits by 2.81 ± 0.42 m/yr. Upslope shift rates increased in smaller-bodied, less territorial species, whereas larger species were more likely to shift downslope. When considering absolute shift rates, rates were fastest for species with high dispersal ability, low foraging strata, and wide elevational ranges. Our results indicate that elevational shift rates are associated with species’ traits, particularly body size, dispersal ability, and territoriality. However, these effects vary substantially across sites, suggesting that responses of tropical montane bird communities to climate change are complex and best predicted within the local or regional context.

2013 ◽  
Vol 23 (6) ◽  
pp. 646-657 ◽  
Author(s):  
Rosa Menéndez ◽  
Adela González-Megías ◽  
Pierre Jay-Robert ◽  
Rocío Marquéz-Ferrando

2021 ◽  
Author(s):  
Joséphine Couet ◽  
Emma-Liina Marjakangas ◽  
Andrea Santangeli ◽  
John Atle Kålås ◽  
Åke Lindström ◽  
...  

Abstract Climate change is pushing species ranges towards poles and mountain tops. Although many studies have documented local altitudinal shifts, knowledge of general patterns at a large spatial scale, such as a whole mountain range, is very limited. From a conservation perspective, studying altitudinal shifts is particularly important as mountain regions often represent biodiversity hotspots and are among the most vulnerable ecosystems. Here, we examine whether altitudinal shifts have occurred among birds in the Scandinavian mountains over 13 years and assess whether such shifts are related to species’ traits. Using abundance data, we show a clear pattern of uphill shifts in the mean altitudes of the bird species’ abundances across the Scandinavian mountains, with an average speed of 0.9 m per year. Out of 77 species, 54 shifted their ranges uphill. In general, the range shift was faster when the altitudinal range within the area was wider. Importantly, the altitudinal shift was strongly related to species’ longevity: short-lived species showed more pronounced altitudinal uphill shifts than long-lived species. Our results show that the altitudinal range shifts are not only driven by a small number of individuals at the range boundaries, but the overall bird abundances are on the move. This highlights the wide-ranging impact of climate change and the potential vulnerability of species with slow life-histories, as they appear unable to timely respond to rapidly changing climatic conditions.


2007 ◽  
Vol 22 (1) ◽  
pp. 140-150 ◽  
Author(s):  
CAGAN H. SEKERCIOGLU ◽  
STEPHEN H. SCHNEIDER ◽  
JOHN P. FAY ◽  
SCOTT R. LOARIE

2015 ◽  
Vol 282 (1808) ◽  
pp. 20150164 ◽  
Author(s):  
Zuzana Burivalova ◽  
Tien Ming Lee ◽  
Xingli Giam ◽  
Çağan Hakkı Şekercioğlu ◽  
David S. Wilcove ◽  
...  

Selective logging is one of the most common forms of forest use in the tropics. Although the effects of selective logging on biodiversity have been widely studied, there is little agreement on the relationship between life-history traits and tolerance to logging. In this study, we assessed how species traits and logging practices combine to determine species responses to selective logging, based on over 4000 observations of the responses of nearly 1000 bird species to selective logging across the tropics. Our analysis shows that species traits, such as feeding group and body mass, and logging practices, such as time since logging and logging intensity, interact to influence a species' response to logging. Frugivores and insectivores were most adversely affected by logging and declined further with increasing logging intensity. Nectarivores and granivores responded positively to selective logging for the first two decades, after which their abundances decrease below pre-logging levels. Larger species of omnivores and granivores responded more positively to selective logging than smaller species from either feeding group, whereas this effect of body size was reversed for carnivores, herbivores, frugivores and insectivores. Most importantly, species most negatively impacted by selective logging had not recovered approximately 40 years after logging cessation. We conclude that selective timber harvest has the potential to cause large and long-lasting changes in avian biodiversity. However, our results suggest that the impacts can be mitigated to a certain extent through specific forest management strategies such as lengthening the rotation cycle and implementing reduced impact logging.


2017 ◽  
Author(s):  
Lauren B. Buckley ◽  
Imran Khaliq ◽  
David L. Swanson ◽  
Christian Hof

AbstractAimWe test whether physiological constraints on maximum metabolic rate and the factor by which endotherms can elevate their metabolism (metabolic expansibility) govern cold range limits for mammal and bird species.LocationGlobalMethodsWe examine metabolic expansibility at the cold range boundary (MEcrb) and its trait predictors and then use MEcrb to project range shifts for 210 mammal and 61 bird species.ResultsWe find evidence for metabolic constraints: the distributions of metabolic expansibility at the cold range boundary peak at similar values for birds (2.7) and mammals (3.2). The right skewed distributions suggest some species have adapted to elevate or evade metabolic constraints. Mammals exhibit greater skew than birds, consistent with their diverse thermoregulatory adaptations and behaviors. Mammal and bird species that are small and occupy low trophic levels exhibit high levels of MEcrb. Mammals with high MEcrb tend to hibernate or use torpor. Predicted metabolic rates at the cold range boundaries represent large energetic expenditures (>50% of maximum metabolic rates). We project species to shift their cold range boundaries poleward by an average of 3.9° latitude by 2070.Main conclusionsOur analysis suggests that metabolic constraints provide a viable mechanism for projecting cold range boundaries and range shifts in response to climate change for endotherms.


2018 ◽  
Vol 625 ◽  
pp. 1596-1605 ◽  
Author(s):  
Luís Reino ◽  
María Triviño ◽  
Pedro Beja ◽  
Miguel B. Araújo ◽  
Rui Figueira ◽  
...  

2018 ◽  
Vol 115 (47) ◽  
pp. 11982-11987 ◽  
Author(s):  
Benjamin G. Freeman ◽  
Micah N. Scholer ◽  
Viviana Ruiz-Gutierrez ◽  
John W. Fitzpatrick

Montane species worldwide are shifting upslope in response to recent temperature increases. These upslope shifts are predicted to lead to mountaintop extinctions of species that live only near mountain summits, but empirical examples of populations that have disappeared are sparse. We show that recent warming constitutes an “escalator to extinction” for birds on a remote Peruvian mountain—high-elevation species have declined in both range size and abundance, and several previously common mountaintop residents have disappeared from the local community. Our findings support projections that warming will likely drive widespread extirpations and extinctions of high-elevation taxa in the tropical Andes. Such climate change-driven mountaintop extirpations may be more likely in the tropics, where temperature seems to exert a stronger control on species’ range limits than in the temperate zone. In contrast, we show that lowland bird species at our study site are expanding in range size as they shift their upper limits upslope and may thus benefit from climate change.


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