We compared the ant assemblages from four very heterogeneous habitats over a short-distance elevational gradient of vegetation (due to the presence of an inselberg) at the Nouragues Research Station, French Guiana. We focused on litter- dwelling ants, combining the use of pitfall traps and the Winkler method according to the Ants of the Leaf Litter Proto- col. This permitted us to note (1) a high leaf-litter ant diversity overall and a decreasing diversity gradient from the lowland rainforest to the top of the inselberg, and (2) differences in species density, composition and functional struc- ture. While the ant assemblages on the plateau and inselberg can be considered functionally similar and typical of an Amazonian rainforest, that of the transition forest, relatively homogenous, rather corresponded to an ant fauna typical of open areas. By contrast, the liana forest assemblage was unexpectedly richer and denser than the others, sheltering a litter-dwelling ant fauna dominated by numerous and abundant cryptic species. These taxonomical and functional dissi- milarities may reflect the influence of the environmental heterogeneity, which, through variable abiotic conditions, can contribute to maintaining a notably rich ant biodiversity in these Neotropical habitats.
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Climate change is altering our environment and societies worldwide have to devise adaptation strategies. Water management strategies are becoming especially important. In the past, societies had to adapt in order to survive as well. Communities often practised long‐term sustainable agriculture. By understanding the ways in which ancient communities were successful at or failed in attaining social‐ecological resilience through water management archeologists can provide important information for modern communities facing similar problems. Archeology's long time perspective is very valuable. However, archeologists are confronted with a number of issues. Archeology can only study the material remains of past societies, not the living communities. Not all human activity translates into material residue and not all materials survive. Moreover, people will not demonstrate completely rational cause‐and‐effect behavior, but ideology and beliefs, which archeology can only poorly attest, will also have influenced decisions. Nevertheless, archeology can bring a unique perspective to the debate on climate change adaptation: archeology can falsify or corroborate sustainability claims, ancient water management techniques may still be a resilient mode of subsistence and ancient techniques often rely on relatively simple technology allowing for easier adoption. When transposing ancient water management techniques to modern situations it is important to involve stakeholders from an early stage, to incorporate traditional knowledge systems as much as possible and most importantly to ascertain whether physical and socio‐cultural circumstances are comparable. Archeological knowledge on ancient sustainability and water management is not a panacea for all climate related aridification, but can contribute a unique longue durée perspective.
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RBINS Staff Publications 2017
