News News

Restored and artificial wetlands do not support the same waterbird functional diversity as natural wetlands

The restoration of degraded areas and the creation of artificial ecosystems have partially compensated for the continuing loss of natural wetlands. However, the success of these wetlands in terms of the capacity of supporting biodiversity and ecosystem functions is unclear. Natural, restored, and artificially created wetlands present within the Doñana protected area were compared to evaluate if they are equivalent in terms of waterbird functional trait diversity and composition. Functional diversity measures and functional group species richness describing species diet, body mass, and foraging techniques were modelled in 20 wetlands in wintering and breeding seasons. Artificial wetlands constructed for conservation failed to reach the functional diversity of natural and restored wetlands. Unexpectedly, artificial ponds constructed for fish production performed better, and even exceeded natural wetlands for functional richness during winter. Fish ponds stood out as having a unique functional composition, connected with an increase in richness of opportunistic gulls and a decrease in species sensitive to high salinity. Overall, the functional structure of breeding communities was more affected by wetland type than wintering communities. These findings suggest that compensating the loss of natural wetlands with restored and artificial wetlands results in systems with altered waterbird?supported functions. Protection of natural Mediterranean wetlands is vital to maintain the original diversity and composition of waterbird functional traits. Furthermore, restoration must be prioritised over the creation of artificial wetlands, which, even when intended for conservation, may not provide an adequate replacement. informacion[at]ebd.csic.es: Almeida et al. (2020) Comparing the diversity and composition of waterbird functional traits between natural, restored, and artificial wetlands. Freshwater Biology DOI 10.1111/fwb.13618


https://onlinelibrary.wiley.com/doi/full/10.1111/fwb.13618
Average (0 Votes)

Latest News Latest News

Back

“Planned obsolescence” in the plumage of larks

"Planned obsolescence" in the plumage of larks

Larks (Alaudidae) present a heavily worn plumage for the most part of the annual cycle, to the point that identification field guides typically depict lark species in both fresh and worn plumages. The ephemeral nature of lark feathers is even more strange knowing that larks are among the few passerines undergoing a single annual molt. Contrarily, a majority of songbirds moult feathers twice a year. Larks are dull-colored ground-dwelling birds living in open areas, thus occupying a niche where abrasion by air and soil particles is maximal. Authors observed that lark feathers have unmelanized fringes and are prone to breakage. Larks may have turned need into a virtue: they possibly cannot avoid a premature damage of their fragile plumage, and instead of incurring the cost of molting repeatedly, they gain the advantage of a form of crypsis known as disruptive camouflage. When feathers break, they create a serrated random pattern, cancelling out the effect of smooth lines more easily detected by predators. informacion[at]ebd.csic.es: Negro et al (2019) Adaptive plumage wear for increased crypsis in the plumage of Palearctic larks (Alaudidae). Ecology https://doi.org/10.1002/ecy.2771


https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecy.2771