%0 Journal Article
%T Marine Nematodes from the Shallow Subtidal Coast of the Adriatic Sea: Species List and Distribution
%A F. Semprucci
%J International Journal of Biodiversity
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/187659
%X This study is the first attempt aiming to assess the composition and number of free-living marine nematode species on the coasts of the Marches region, Italy. A high number of putative species of nematodes were recognized (84), these belonging to 52 genera in 22 families. Fifty-one taxa have been identified to the species level increasing the number of known nematode species for the Adriatic Sea from 283 to 310 and for the Mediterranean Sea from 700 to 723. The highest diversity and abundance were registered for the nematode families typically of intertidal zones characterized as medium-fine sands. The majority of the species found in the present study are known to occur in the North European coasts or the North Atlantic Sea, the best known regions for nematode distribution. Inferences on the biogeography of marine nematodes are preliminary since most Biodiversity literature concerning the Mediterranean of the basin is very out of date. Considering the great importance of nematodes in the assessment of ecosystem health conditions, an intensification of sampling efforts should be pursued in other regions in order to improve our current knowledge of the distribution pattern of marine nematode species as well as clarify their biogeographical patterns. 1. Introduction Marine nematodes are the most abundant metazoans in marine sediments, reaching densities as high as 20 million individuals per square meter [1]. They generally are the dominant component of the meiofauna in any aquatic habitat, often one order of magnitude higher than any other major taxon [1]. Estimates of global nematode species diversity have significantly varied over the past 15 years, but with a growing agreement suggesting about one million species [2, 3]. Their great importance in marine ecology as bioindicators is well recognized [4, 5]. The study of nematode communities offers several advantages for assessing the quality of freshwater, marine, and terrestrial ecosystems. These organisms show great diversity and abundance which make easier their sampling; they present different trophic groups as well as being intimately related with their environment, the sediment. Therefore, they can provide important information on the ecological state of a given area once they are exposed to pollutants. Furthermore, they have been recently proposed within the Water Framework Directive (WFD, Directive 2000/60/EC) [6] as a tool for evaluating the ecological quality status of marine vulnerable ecosystems. The taxonomy of marine nematodes is known to be very difficult (see for review [7]), in part due
%U http://www.hindawi.com/journals/ijbd/2013/187659/