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511 results for “climate effects”

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dryad36/100

Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies

Optimization of clutch size and timing of reproduction have substantial effects on lifetime reproductive success in vertebrates, and both individual quality and environmental variation may impact life history strategies. We tested hypotheses related to maternal investment and timing of reproduction, using 17 years (1978-1994) of individual-based life history data on willow ptarmigan (Lagopus l. lagopus, n=290 breeding females with n=319 breeding attempts) in central Norway. We analysed whether climatic variation and individual state variables (age and body mass) affected number of offspring and timing of reproduction, and individual repeatability in strategies. The results suggest that willow ptarmigan share a common optimal clutch size that is largely independent of measured individual states. While we found no clear direct weather effects on clutch size, higher spring temperatures advanced onset of breeding, and early breeding was followed by an increased number of offspring. Warmer springs were positively related to maternal mass, and mass interacted with clutch size in production of hatchlings. Finally, clutch size and timing of reproduction were highly repeatable within individuals, indicating that individual quality guided trade-offs in reproductive effort. Our results demonstrate how climatic forcing and individual heterogeneity in combination influenced life history traits in a resident montane keystone species.

opencc-zeroMay 2023View details →

zenodo36/100

A comparison of the climate and carbon cycle effects of carbon removal by Afforestation and Reduction of Fossil fuel emissions

This dataset is for the journal article titled "A comparison of the climate and carbon cycle effects of carbon removal by Afforestation and Reduction of Fossil fuel emissions".

opencc-by-4.0Nov 2022View details →

zenodo36/100

The positive effect of plant diversity on soil carbon depends on climate

The three files contain all data (Data S1) and all R code to produce all tables and figures of the manuscript entitled "The positive effect of plant diversity on soil carbon depends on climate".

opencc-by-4.0Jul 2023View details →

dryad36/100

Effects of land use and climate change on functional and phylogenetic diversity of terrestrial vertebrates in a Himalayan biodiversity hotspot

Aim: Land use and climate change interact to impact functional and phylogenetic diversity globally, but this pattern is largely unknown in the eastern Himalayas. We aim to discern the response of community diversity and structure of terrestrial mammals and birds to anthropogenic land use and climate change in this hitherto understudied landscape. Location: Himalayan biodiversity hotspot, Bhutan Methods: We used camera trap and point-count transect data to estimate taxonomic, functional, and phylogenetic diversity while accounting for detectability. We calculated the abundance-weighted standardised effect sizes (ses) of mean pairwise distance and mean nearest taxon distance. The ses metrics were regressed against land use (agriculture and forest) and climate (temperature and precipitation) variables using linear mixed effect models. Results: Community diversity declined with agriculture in both groups. Mammal diversity was higher farther from the settlement but birds remained indifferent. Temperature and precipitation were positively associated with mammal diversity, but birds displayed a mixed response: negative with temperature and positive with precipitation. Agriculture had a strong negative effect on the functional structure of birds but not mammals. The functional and phylogenetic structure declined farther from the settlement for mammals but increased for birds. Except for the functional structure, all other metrics increased with temperature and precipitation for mammals. Except for the positive relationship between functional structure and temperature, other metrics showed a mixed response to climate in birds. Main conclusions: Our findings provide evidence that land use rather than climate has an imminent effect in shaping local and regional patterns of terrestrial vertebrate diversity in a Himalayan biodiversity hotspot. Climate effects, although weak, may reduce functional traits and consequently diminish functional roles. Species that can persist in human-modified environments are clustered within a phylogeny, suggesting possible loss of phylogenetic diversity.

opencc-zeroJul 2023View details →

dryad36/100

Code from: Efficiency traps beyond the climate crisis: Exploration-exploitation tradeoffs and rebound effects

These data are part of a data portal that accompanies the special issue 'Climate change adaptation needs a science of culture,' published in Philosophical Transactions of the Royal Society B in 2023. To access the data portal, please visit: <a href="https://doi.org/10.5061/dryad.bnzs7h4h4">https://doi.org/10.5061/dryad.bnzs7h4h4</a>. This code represents a computational model investigating the dynamics of coupled and decoupled resource use and efficiency gains. It can be used to simulate the effects of exploration-exploitation strategies on efficiency, consumption and sustainability, considering different levels of direct and indirect rebound effects. The model simulates a population of agents who make decisions on whether to explore or exploit a natural resource. These agents become more efficient over time based on their chosen strategy, affecting resource consumption. Different scenarios are considered, including various rebound effects, which influence how efficiency gains impact resource use. The key elements of the model include agents' uncertainty about the efficiency of their actions, the operationalization of efficiency as a reward, and the calculation of resource consumption based on efficiency gains and rebound effects. The model provides insights into how agents' decisions and resource use evolve over time under different conditions. This computational framework offers a valuable tool for exploring the complex dynamics of resource consumption and management in the face of environmental challenges. It can be applied to gain a deeper understanding of the Jevons Paradox and its implications for sustainable resource use.

opencc-zeroSep 2023View details →

dryad36/100

Invasion dynamics of the European Collared-Dove are explained by combined effects of habitat and climate

Global biodiversity is increasingly threatened by the spread of invasive species. Understanding the mechanisms influencing the initial colonization and persistence of invaders is therefore needed if conservation actions are to prevent new invasions or strive to slow their spread. The Eurasian collared-dove (Streptopelia decaocto, EUCO) is one of the most successful avian invasive species in North America; however, to our knowledge, no study has simultaneously examined the role that climate-matching, human activity, directional propagation, and local density have in this invasion process. Our research expands upon a cellular-automata-based hierarchical model developed to assess directional invasion dynamics to further quantify the impacts of climate, elevation, and land cover type on the spread of EUCO in North America. Our results suggest that EUCO's dispersal patterns can largely be explained by the effects of habitat, climate, and environmental conditions at different stages of the invasion process rather than some innate preferred north-westerly spread. Specifically, EUCO initially colonized warm and wet grassland habitats and tended to persist in urban areas. We also found that while EUCO were more likely to spread to the northeast of existing habitats, directional preference did not drive persistence and recolonization events. These findings highlight the importance of incorporating both neighbourhood effects and environmental factors in the modelling of range-expanding species, adding to the toolset available to researchers to model invasive species spread. Further, our research demonstrates that historical records of invasive species occurrences from citizen science projects can provide the data resources needed to disentangle the characteristics driving species invasion and enable predictions that are of critical importance to resource managers.

opencc-zeroSep 2023View details →

dryad36/100

Effect of climate-change-induced increases on the range of rice-barley double cultivation on the intermediate egret

Intensification of cultivation methods and land use types, particularly in the face of climate change, has steadily weakened the habitat function of rice fields for waterbirds. Intermediate egrets (Ardea intermedia) are highly dependent on rice field habitats. Here, we examine the effect of a shift from rice monoculture to rice–barley double cultivation on the use of rice fields by intermediate egrets in South Korea. Rice-barley double cultivation has been increasing steadily in the southern region of South Korea due to changes in the rice growth period under climate change and maximization of economic benefits. We studied rice fields to determine the effect of the rice-barely double cultivation area on the abundance of intermediate egrets on the regional scale and their potential distribution pattern in response to double cultivation in relation to climate change using national-scale climate, altitude, and land cover data from May 1 to June 23, 2018. Compared to the irrigation practices used for rice monoculture, irrigation was stopped for some time in rice-barley double cultivation prior to planting, compromising the role of rice fields as a food ground for intermediate egrets. The potential abundance of intermediate egrets rapidly decreased by half when the double cultivation area increased to >40% of the total rice-field area, and was less than one individual if the area increased to >80%. Furthermore, according to climate change projections, by 2100, the double cultivation area would account for 75.74% of the predicted range of intermediate egret foraging ground. Synthesis and applications. Double cultivation areas should be <40% of existing rice fields to minimize the impact of the change in cultivation practices. This approach can also convert rice fields to other types of land use. Consequently, appropriate conservation and management measures may be developed to maintain suitable habitats despite rapidly changing cultivation practices resulting from climate change.

opencc-zeroSep 2023View details →

dryad36/100