Abstract:
:Changing climates are altering wildlife habitats and wildlife behavior in complex ways. Here, we examine how changing spring snow cover dynamics and early season forage availability are altering grizzly bear (Ursus arctos) behavior postden emergence. Telemetry data were used to identify spring activity dates for 48 individuals in the Yellowhead region of Alberta, Canada. Spring activity date was related to snow cover dynamics using a daily percent snow cover dataset. Snow melt end date, melt rate, and melt consistency explained 45% of the variation in spring activity date. We applied this activity date model across the entire Yellowhead region from 2000 to 2016 using simulated grizzly bear home ranges. Predicted spring activity date was then compared with a daily spring forage availability date dataset, resulting in "wait time" estimates for four key early season forage species. Temporal changes in both spring activity date and early season forage "wait times" were assessed using non-parametric regression. Grizzly bear activity date was found to have either remained constant (95%) or become earlier (5%) across the study area; virtually no areas with significantly later spring activity dates were detected. Similarly, the majority of "wait times" did not change (85%); however, the majority of significant changes in "wait times" for the four early season forage species indicated that "wait times" were lessening where changes were detected. Our results show that spring activity date is largely dictated by snow melt characteristics and that changing snow melt conditions may result in earlier spring activity. However, early season food stress conditions are likely to remain unchanged or improve as vegetation phenology also becomes earlier. Our findings extend the recent work examining animal movement in response to changing phenology from migratory birds and ungulates to an apex predator, further demonstrating the potential effects of changing climates on wildlife species.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Rickbeil GJM,Coops NC,Berman EE,McClelland CJR,Bolton DK,Stenhouse GBdoi
10.1111/gcb.15295subject
Has Abstractpub_date
2020-07-28 00:00:00eissn
1354-1013issn
1365-2486pub_type
杂志文章abstract::'Blue Carbon', which is carbon captured by marine living organisms, has recently been highlighted as a new option for climate change mitigation initiatives. In particular, coastal ecosystems have been recognized as significant carbon stocks because of their high burial rates and long-term sequestration of carbon. Howe...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12543
更新日期:2014-06-01 00:00:00
abstract::The impact of climate change and of other anthropogenic pressures on the structure and composition of phytoplankton communities of large European rivers remains poorly documented. Here we report the findings of a study of the changes in the phytoplankton community of the middle segment of the river Loire over the past...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12139
更新日期:2013-05-01 00:00:00
abstract::In Boulanger et al. (2018), we investigated the effects of ungulates on forest plant diversity. By suggesting a revisit of our conclusions regarding ecosystem dynamics since the late Pleistocene, Fløjgaard et al. (2018) came to the conclusion that moderate grazing in forest should be a conservation target. Since major...
journal_title:Global change biology
pub_type: 评论,信件
doi:10.1111/gcb.14122
更新日期:2018-06-01 00:00:00
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journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13163
更新日期:2016-08-01 00:00:00
abstract::The rate at which biological diversity is altered on both land and in the sea, makes temporal community development a critical and fundamental part of understanding global change. With advancements in trait-based approaches, the focus on the impact of temporal change has shifted towards its potential effects on the fu...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14552
更新日期:2018-12-20 00:00:00
abstract::Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO2 levels due to ocean acidification. However, there are currently no data on the effects of ocean acidification on iodine metabolism in kelp. As key primary producers in coastal ecosystems...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14467
更新日期:2019-02-01 00:00:00
abstract::Equatorial populations of marine species are predicted to be most impacted by global warming because they could be adapted to a narrow range of temperatures in their local environment. We investigated the thermal range at which aerobic metabolic performance is optimum in equatorial populations of coral reef fish in no...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12455
更新日期:2014-04-01 00:00:00
abstract::Maps of continental-scale land cover are utilized by a range of diverse users but whilst a range of products exist that describe present and recent land cover in Europe, there are currently no datasets that describe past variations over long time-scales. User groups with an interest in past land cover include the clim...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12776
更新日期:2015-03-01 00:00:00
abstract::Boreal lakes are major components of the global carbon cycle, partly because of sediment-bound heterotrophic microorganisms that decompose within-lake and terrestrially derived organic matter (t-OM). The ability for sediment bacteria to break down and alter t-OM may depend on environmental characteristics and communit...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14391
更新日期:2018-11-01 00:00:00
abstract::Recently, there have been several studies using open top chambers (OTCs) or cloches to examine the response of Arctic plant communities to artificially elevated temperatures. Few, however, have investigated multitrophic systems, or the effects of both temperature and vertebrate grazing treatments on invertebrates. Thi...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12284
更新日期:2013-12-01 00:00:00
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journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12482
更新日期:2014-07-01 00:00:00
abstract::Realistic representation of land carbon sink in climate models is vital for predicting carbon climate feedbacks in a changing world. Although soil erosion that removes land organic carbon has increased substantially since the onset of agriculture, it is rarely included in the current generation of climate models. Usin...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14982
更新日期:2020-01-08 00:00:00
abstract::Efforts to limit global warming to below 2°C in relation to the pre-industrial level are under way, in accordance with the 2015 Paris Agreement. However, most impact research on agriculture to date has focused on impacts of warming >2°C on mean crop yields, and many previous studies did not focus sufficiently on extre...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14542
更新日期:2018-12-07 00:00:00
abstract::Most North American forests are at some stage of post-disturbance regrowth, subject to a changing climate, and exhibit growth and mortality patterns that may not be closely coupled to annual environmental conditions. Distinguishing the possibly interacting effects of these processes is necessary to put short-term stud...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12404
更新日期:2014-01-01 00:00:00
abstract::Global urbanization trends impose major alterations on surface waters. This includes impacts on ecosystem functioning that can involve feedbacks on climate through changes in rates of greenhouse gas emissions. The combination of high nutrient supply and shallow depth typical of urban freshwaters is particularly conduc...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14799
更新日期:2019-12-01 00:00:00
abstract::Shifts of distributions have been attributed to species tracking their fundamental climate niches through space. However, several studies have now demonstrated that niche tracking is imperfect, that species' climate niches may vary with population trends, and that geographic distributions may lag behind rapid climate ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13478
更新日期:2017-04-01 00:00:00
abstract::Migration of plant populations is a potential survival response to climate change that depends critically on seed dispersal. Biological and physical factors determine dispersal and migration of wind-dispersed species. Recent field and wind tunnel studies demonstrate biological adaptations that bias seed release toward...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12173
更新日期:2013-06-01 00:00:00
abstract::Sequestration of soil organic carbon (SOC) has been recognized as an opportunity to off-set global carbon dioxide (CO2 ) emissions. Flipping (full inversion to 1-3 m) is a practice used on New Zealand's South Island West Coast to eliminate water-logging in highly podzolized sandy soils. Flipping results in burial of S...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14588
更新日期:2019-07-01 00:00:00
abstract::Arctic climate warming will be primarily during winter, resulting in increased snowfall in many regions. Previous tundra research on the impacts of deepened snow has generally been of short duration. Here, we report relatively long-term (7-9 years) effects of experimentally deepened snow on plant community structure, ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14084
更新日期:2018-08-01 00:00:00
abstract::Many taxa are undergoing distribution shifts in response to anthropogenic climate change. However, detecting a climate signal in mobile species is difficult due to their wide-ranging, patchy distributions, often driven by natural climate variability. For example, difficulties associated with assessing pelagic fish dis...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13129
更新日期:2016-03-01 00:00:00
abstract::Atmospheric nitrogen (N) deposition has frequently been observed to increase soil carbon (C) storage in forests, but the underlying mechanisms still remain unclear. Changes in microbial community composition and substrate use are hypothesized to be one of the key mechanisms affected by N inputs. Here, we investigated ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12374
更新日期:2014-01-01 00:00:00
abstract::The permafrost organic carbon (OC) stock is of global significance because of its large pool size and the potential positive feedback to climate warming. However, due to the lack of systematic field observations and appropriate upscaling methodologies, substantial uncertainties exist in the permafrost OC budget, which...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13257
更新日期:2016-08-01 00:00:00
abstract::Geographic range size is the manifestation of complex interactions between intrinsic species traits and extrinsic environmental conditions. It is also a fundamental ecological attribute of species and a key extinction risk correlate. Past research has primarily focused on the role of biological and environmental predi...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12834
更新日期:2015-06-01 00:00:00
abstract::Soil moisture constrains the activity of decomposer soil microorganisms, and in turn the rate at which soil carbon returns to the atmosphere. While increases in soil moisture are generally associated with increased microbial activity, historical climate may constrain current microbial responses to moisture. However, i...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13219
更新日期:2016-05-01 00:00:00
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journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12257
更新日期:2013-10-01 00:00:00
abstract::Plant community composition and functional traits respond to chronic drivers such as climate change and nitrogen (N) deposition. In contrast, pulse disturbances from ecosystem management can additionally change resources and conditions. Community responses to combined environmental changes may further depend on land-u...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14955
更新日期:2020-03-01 00:00:00
abstract::Developing conservation strategies for threatened species increasingly requires understanding vulnerabilities to climate change, in terms of both demographic sensitivities to climatic and other environmental factors, and exposure to variability in those factors over time and space. We conducted a range-wide, spatially...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12510
更新日期:2014-07-01 00:00:00
abstract::Crop production will likely face enormous challenges against the occurrences of extreme climatic events projected under future climate change. Heat waves that occur at critical stages of the reproductive phase have detrimental impacts on the grain yield formation of rice (Oryza sativa). Accurate estimates of these imp...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.15393
更新日期:2021-01-01 00:00:00
abstract::Climate warming is occurring at an unprecedented rate in the Arctic and is having profound effects on host-parasite interactions, including range expansion. Recently, two species of protostrongylid nematodes have emerged for the first time in muskoxen and caribou on Victoria Island in the western Canadian Arctic Archi...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12315
更新日期:2013-11-01 00:00:00
abstract::Unprecedented rates of climate warming over the past century have resulted in increased forest stress and mortality worldwide. Decreased tree growth in association with increasing temperatures is generally accepted as a signal of temperature-induced drought stress. However, variations in tree growth alone do not revea...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12893
更新日期:2015-08-01 00:00:00