NDLI: Is the Cantabrian region of northern Spain a biodiversity hotspot for obligate groundwater fauna? The case of oligochaetes (Annelida, Clitellata)

Content Provider	Springer Nature Link
Author	Achurra, Ainara Rodriguez, Pilar Reyldson, Trefor B.
Copyright Year	2014
Abstract	This study aimed to (i) evaluate species richness and endemicity for the stygobiont oligochaete taxa (Annelida, Clitellata) in the Cantabrian region of northern Spain; and (ii) identify the environmental factors that determine the stygobiont assemblages at the regional scale. We recorded and examined more than 7,000 specimens of groundwater oligochaetes from 58 sampling sites. Of 62 identified species, 15 were classified as stygobionts, raising the known stygobiont oligochaete richness in the Cantabrian region to 21 species. As a result, the region is the second richest area for stygobiont oligochaete fauna in Europe after Slovenia with 28 species. Stygobiont oligochaetes exhibited a high degree of endemicity: 9 stygobionts were endemic to their type localities and 8 were restricted to geographic areas of less than 240 km in length, which underlines the narrow geographic ranges for subterranean fauna. Differences among the karsts were observed but the measured environmental factors did not explain the structure of the stygobiont assemblages in the Cantabrian region. Electrical conductivity, latitude and longitude influenced stygobiont species distributions but correlation values were low. Other ecological and historical factors should be evaluated in future; in particular, marine transgressions–regressions may have played a major role as evidenced by the large number of stygobionts of marine origin (8 species) found in both coastal and inland karsts.
Starting Page	151
Ending Page	166
Page Count	16
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	745
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-11-05
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Subterranean Stygobiont Endemicity Marine origin Conservation Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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