Abstract
Abstract: We present a checklist for the aquatic biodiversity from two reservoirs within a PPBio (Biodiversity Research Program) site in a peri-urban forest fragment, the Dois Irmãos State Park (PEDI), in Pernambuco, Brazil. We obtained the data via extensive field collection and information from a specialized literature survey. We recorded 397 species in 156 families; the animal was the most abundant group (140 species) followed by fungi taxa (103), periphyton (69), aquatic macrophytes (44), and terrestrial plants in flooded areas (41). This review reflects different sample efforts toward selected groups and allows the definition of a long-term protocol for guiding new research based on the identified knowledge gaps revealed. Future ecological research should address the influence of the trophic state of the reservoirs, as well as the effects of competitive exclusion and predation on the long-term viability of the local diversity.
Highlights
Continental aquatic ecosystems have been experiencing unprecedented disturbances in recent decades (Saunders et al 2002) and are among the most threatened ecosystems in the world (Dudgeon et al 2006) with 65% of aquatic habitats threatened (Vörösmarty et al 2010)
Research about Fungi and periphyton, for instance, are exclusive to the Prata water body most of the studies in the Parque Estadual Dois Irmãos (PEDI) were performed in both reservoirs (36.36%) or on the Dois Irmãos reservoir (36.36%)
The water bodies had a reduced group diversity of fauna and flora, probably due to the minor amount of scientific work performed and published in this area. These data reinforce the importance of programs such as the PPBio that focuses on the formation of a reliable database, grants for studies on the biological community structure, and biodiversity knowledge (Pezzini et al 2012)
Summary
Continental aquatic ecosystems have been experiencing unprecedented disturbances in recent decades (Saunders et al 2002) and are among the most threatened ecosystems in the world (Dudgeon et al 2006) with 65% of aquatic habitats threatened (Vörösmarty et al 2010). Aquatic biodiversity is under pressure (JanuchowskiHartley et al 2016), leading to both population decline and range reduction of freshwater species (Dudgeon et al 2006). Between 1990 and 2010, 123 freshwater animal species were considered to be extinct in North America alone (Ricciardi & Rasmussen 1999) while 10,000 to 20,000 freshwater species are estimated to be under risk of extinction or already extinct worldwide (Vörösmarty et al 2010). Knowledge of biodiversity is insufficient for tropical regions where a high number of species are distributed, but species loss rates have still not been accurately calculated (Dudgeon et al 2006)
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