5 documents found, page 1 of 1
Species accumulation curves and extreme value theory
Borda-de-Água, Luís; Alirezazadeh, Saeid; Neves, Manuela; Hubbell, Stephen P.; Borges, Paulo A. V.; Cardoso, Pedro; Dionísio, FranciscoThe species–area relationship (SAR) has been described as one of the few general patterns in ecology. Although there are many types of SAR, here we are concerned solely with the so-called species accumulation curve (SAC). The theoretical basis of this relationship is not well established. Here, we suggest that extreme value theory, also known as the statistics of extremes, provides a theoretical foundation for,...
Biodiversity recovery of Neotropical secondary forests
Rozendaal, Danaë M.A.; Bongers, Frans; Aide, T. Mitchell; Álvarez-Dávila, Esteban; Ascarrunz, Nataly L.; Balvanera, Patricia; Becknell, Justin M.Old-growth tropical forests harbor an immense diversity of tree species but are rapidly being cleared, while secondary forests that regrow on abandoned agricultural lands increase in extent. We assess how tree species richness and composition recover during secondary succession across gradients in environmental conditions and anthropogenic disturbance in an unprecedented multisite analysis for the Neotropics. S...
Local spatial structure of forest biomass and its consequences for remote sensi...
Réjou-Méchain, Maxime; Muller-Landau, Helene C.; Detto, Matteo; Thomas, Sean C.; Le-Toan, Thuy; Saatchi, Sassan S.; Barreto-Silva, Juan SebastianAdvances in forest carbon mapping have the potential to greatly reduce uncertainties in the global carbon budget and to facilitate effective emissions mitigation strategies such as REDD+ (Reducing Emissions from Deforestation and Forest Degradation). Though broad-scale mapping is based primarily on remote sensing data, the accuracy of resulting forest carbon stock estimates depends critically on the quality of ...
BioTIME: A database of biodiversity time series for the Anthropocene
Dornelas, Maria; Antão, Laura H.; Moyes, Faye; Bates, Amanda E.; Magurran, Anne E.; Adam, Dušan; Akhmetzhanova, Asem A.; Appeltans, WardMotivation The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analy...
Spatial scaling of species abundance distributions
Borda-de-Água, Luís; Borges, Paulo A. V.; Hubbell, Stephen P.; Pereira, Henrique M.Species abundance distributions are an essential tool in describing the biodiversity of ecological communities. We now know that their shape changes as a function of the size of area sampled. Here we analyze the scaling properties of species abundance distributions by using the moments of the logarithmically transformed number of individuals. We find that the moments as a function of area size are well fitted b...