In a new paper, Falko Buschke tried to test whether vertebrates that differ in conservation status differ in to what extent their ranges can be predicted by spatial and environmental gradients. It turns out there are no strong differences. Instead, models to predict the ranges of the most threatened species perform much worse than models for least concern species. Also, response to broad environmental gradients could not distinguish endangered, threatened or least concern species. This suggests that we may underestimate extinction risk of species if we would try to assess this based on reliance on specific environmental conditions.
The paper is out in Biodiversity & Conservation
I visited the University of Rostock to consult with some of the world’s leading experts on the ecology of isolated mountain habitats known as inselbergs. We’ll be joining forces for a number of future projects combining insights from plants and animals to better understand how these enigmatic landscape features survived through the ages and how their biota interact with the landscape matrix around them.
As from October, Mathil Vandromme will join the research group after having succefully obtained a VLADOC PhD grant awarded by the Flemish Interuniversity Council for Developmental Aid. Mathil will start to work on the potential ecosystem services provided by bromeliad plants that grow in plantations of coffee and cocoa in Nicaragua. After completing her BSc at VUB, she enrolled in the Erasmus Mundus MSc programme in tropical ecology (TROPIMUNDO). During her MSc degree she worked on an elevational gradient in the Monteverde Cloud Forest in Costa Rica.
After just three years, Falko Buschke‘s Erasmus Mundus PhD fellowship came to an end. Just months later he succesfully defended his PhD thesis. Initially drawn to Belgium with the prospect of doing a thesis on community dynamics with a lot of empirical work, Falko soon settled into a different niche. Making use of the IUCN database he set out to explain the distribution patterns of terrestrial vertebrates in Africa. For this he used a very diverse set of statistical tools. He reconstructed biogeographical patterns in Africa based on how species present in different locations respond to spatial and environmental gradients. He experimented with novel ways to define regional species pools and investigated the drivers of patterns of alpha and beta diversity. Finally, he also experimented with spreading dye models and built a neutral metacommunity model to explain different biogeographical patterns in this realm. Overall, it was an exciting journey exploring the interface between community ecology and macro ecology. Falko, it was great having you here. We will miss your wit and humour now you have returned to South Africa… and will continue to follow your adventures on http://solitaryecology.com/
Just two weeks later, Tom Pinceel joined Falko in the league of doctors. After doing a MSc working on genetic patterns in rock pool fairy shrimp, Tom continued along this path and started to explore the hatching strategies of these enigmatic inhabitants of temporary pools worldwide. Tom showed adaptive variation in hatching strategies of pool invertebrates along a gradient of habitat stability. He also revealed that the ancient diversification of fairy shrimp on the Australian continent coincided with a period of intense aridification. When Australia lost most of its rainforests, desert adapted fauna like fairy shrimps seem to have benefited and responded with a spectacular adaptive radiation. This resulted in a nice little booklet with most of his chapters already published. Tom is now continuing his research into delayed hatching as a survival strategy in extreme environments as a prospective post doc. We can only hope he will be able to continue his work in the near future.
In a new paper out in the journal Ecography, Falko Buschke tried to explain the distribution patterns of all terrestrial vertebrates that occur in sub Sahara Africa using environmental variables and spatial dispersal related variables.
He found that when you map Africa based on how much variation is explained by dispersal based processes vs. environmental niche based filtering, you can see the contours of the biogeographic regions. This suggests that community structuring processes differ among regions within biogeographic realms.
He also showed that corrections for range size are necessary to extract ecologically meaningful patterns from variation partitioning results.
Finally, he found that unexplained variation was highest in species with small distributions… which is worrying from a conservation perspective as these are often threatened. While we can quite accurately predict distributions of widespread animals, we don’t know very well why certain rarer species are range restricted.
An African Black Rhino. One of the species in Falko’s database.