NDLI: Changes in the status of tortoise populations in Greece 1984

Content Provider	Springer Nature Link
Author	Hailey, A. Willemsen, R.E.
Copyright Year	2003
Abstract	Three species of tortoise (Testudinidae) occur in Greece (Testudo hermanni, T. graeca and the endemic T. marginata), all of which have been listed as rare or vulnerable. This paper describes the current situation of 75 populations that were last observed in the 1970s and 1980s and described in 1989. Twenty-nine populations had declined in density and/or status (significantly more than had improved), 10 of which were functionally extinct. A particularly notable loss was a dense population of T. marginata at Gytheion in the Peloponnese due to a widespread fire. Declining populations were significantly associated with identified high threat in 1989 and with close proximity to human settlement. There were no significant effects of tortoise species, area of site, characteristics of surrounding areas or original density on these changes. Declines were less associated with agriculture than predicted in 1989, reflecting changing economic conditions in Greece in the 1990s. Continuing threats to tortoise habitats make their long-term future appear bleak outside of protected areas. The risk of extinction from stochastic variation in small populations was also assessed, using the VORTEX program. This risk was much lower than that from habitat loss; 60–96% of populations of 100 tortoises would survive for 1000 years, depending on adult body size, compared to only 0–0.02% of habitats. The high survival potential of small populations would facilitate conservation of the high intraspecific diversity of tortoises in Greece.
Starting Page	991
Ending Page	1011
Page Count	21
File Format	PDF
ISSN	09603115
Journal	Biodiversity and Conservation
Volume Number	12
Issue Number	5
e-ISSN	15729710
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Evolutionary Biology Tree Biology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation

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Contents Volume 10 (2001)

The Exploitation of Mammal Populations

Conservation status of parrot populations in an Atlantic rainforest area of southeastern Brazil

Conservation Biology

Hotspots of endemic terrestrial invertebrates in southern Greece

Changes in the Alyki Kitrous wetland in northern Greece: 1990–1999, and future prospects

Conservation genetics

Key word index Volume 10 (2001)

Species diversity, endemism and conservation of the family Caryophyllaceae in Greece

Changes in the status of tortoise populations in Greece 1984–2001

Similar Documents

Contents Volume 10 (2001)

The Exploitation of Mammal Populations

Conservation status of parrot populations in an Atlantic rainforest area of southeastern Brazil

Conservation Biology

Hotspots of endemic terrestrial invertebrates in southern Greece

Changes in the Alyki Kitrous wetland in northern Greece: 1990–1999, and future prospects

Conservation genetics

Key word index Volume 10 (2001)

Species diversity, endemism and conservation of the family Caryophyllaceae in Greece

Changes in the status of tortoise populations in Greece 1984–2001