نتایج جستجو برای: bioclimatic variables

تعداد نتایج: 314449  

Journal: :Ecological Indicators 2021

• Machine learning and model-agnostic approaches are relevant in agricultural land research. Biophysical bioclimatic variables explained most global interpretability. Drainage density is important for globally explaining wheat, maize, olive grove plantation. Socioeconomic became equally at the parcel level. Degree of mechanisation influences specific parcels wheat. To effectively plan manage us...

2011
Maria Triviño Wilfried Thuiller Mar Cabeza Thomas Hickler Miguel B. Araújo

Although climate is known to be one of the key factors determining animal species distributions amongst others, projections of global change impacts on their distributions often rely on bioclimatic envelope models. Vegetation structure and landscape configuration are also key determinants of distributions, but they are rarely considered in such assessments. We explore the consequences of using ...

2015
Kari Klanderud Vigdis Vandvik Deborah Goldberg Cristina Armas

We assessed if the relative importance of biotic and abiotic factors for plant community composition differs along environmental gradients and between functional groups, and asked which implications this may have in a warmer and wetter future. The study location is a unique grid of sites spanning regional-scale temperature and precipitation gradients in boreal and alpine grasslands in southern ...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2014
Agnès Bégué Elodie Vintrou Alexandre Saad Pierre Hiernaux

Start-of-season data are more and more used to qualify the land surface phenology trends in relation with climate variability and, more rarely, with human land management. In this paper, we compared the phenology of rangeland vs cropped land in the Sahel belt of Africa, using the only currently available global phenology product (MODIS MCD12Q2 – Land Cover Dynamics Yearly), and an enhanced crop...

Journal: :Proceedings. Biological sciences 2005
Gian-Reto Walther Silje Berger Martin T Sykes

Recently, there has been increasing evidence of species' range shifts due to changes in climate. Whereas most of these shifts relate ground truth biogeographic data to a general warming trend in regional or global climate data, we here present a reanalysis of both biogeographic and bioclimatic data of equal spatio-temporal resolution, covering a time span of more than 50 years. Our results reve...

2012
Esther Galbrun Pauli Miettinen

We present Siren, an interactive tool for mining and visualizing geospatial redescriptions. Redescription mining is a powerful data analysis tool that aims at finding alternative descriptions of the same entities. For example, in biology, an important task is to identify the bioclimatic constraints that allow some species to survive, that is, to describe geographical regions in terms of both th...

2015
Jose Lopez-Collado Catalino Jorge Lopez-Collado

The objective of this study was to estimate the potential distribution of Rhyssomatus nigerrimus in Mexico. Point presence data and bioclimatic data were used to construct the model. Kernel density distributions were estimated for the bioclimatic layers to represent the response function and to combine them. The vulnerability of municipalities planted with soybean was computed as a function of ...

Journal: :Trends in ecology & evolution 2007
Miguel B Araújo Mark New

Concern over implications of climate change for biodiversity has led to the use of bioclimatic models to forecast the range shifts of species under future climate-change scenarios. Recent studies have demonstrated that projections by alternative models can be so variable as to compromise their usefulness for guiding policy decisions. Here, we advocate the use of multiple models within an ensemb...

2013
Paul Evangelista Nicholas Young Jonathan Burnett

Nearly all of Ethiopia’s agriculture is dependent on rainfall, particularly the amount and seasonal occurrence. Future climate change predictions agree that changes in rainfall, temperature, and seasonality will impact Ethiopia with dramatic consequences. When, where, and how these changes will transpire has not been adequately addressed. The objective of our study was to model how projected cl...

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