Characters of "traditional" and "modern" vegetation landscapes - a comparison of northern Morocco and southern Spain

Bruelheide, Helge; Jandt, Ute; Gries, Dirk; Thomas, Frank M.; Foetzki, Andrea; Bürkert, Andreas; Gang, Wang; Zhang, Ximing; Runge, Michael C.

doi:10.1127/0340-269x/2003/0033-0801

Cited by 65 publications

(47 citation statements)

References 8 publications

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“…1a). Many oases in the Tarim Basin are physically isolated by the desert, and the oases at southern margin of Tarim Basin that are suffered from severe desert encroachment are being fragmented or buried by sand (Zhu et al 1991 ;Fan 1993;Zhong and Xiong 1999;Yang 2001;Bruelheide et al 2003;Zu et al 2003).…”

Section: Introductionmentioning

confidence: 98%

Habitat fragmentation affects genetic diversity and differentiation of the Yarkand hare

Xia

Zhang

et al. 2009

Conserv Genet

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The Yarkand hare, Lepus yarkandensis, is an endemic, endangered species restricted to the Tarim Basin of the Xinjiang Uygur Autonomous Region, China. The Yarkand hare is distributed in scattered oases which are physically isolated by the desert. Its natural fragmentation habitat makes it an ideal object for studying effect of habitat fragmentation on its genetic structure. To evaluate the effects of habitat fragmentation on genetic diversity of the species, we assessed genetic diversity for 20 sampling populations based on control region and Cytb markers. Relatively low levels of gene diversity are found in most of isolated populations in the southern margin of the Taklamakan Desert. Furthermore, a positive correlation is found between gene diversity and the size of historical effective population. Significant genetic differentiation is detected among most populations by pairwise F ST analyses, which is characterized by an isolation by distance pattern. Additionally, the AMOVA results show highly significant population structure among seven geographical groups. High migration rates are found among continuous populations, while very low levels of migration rates are found among the relatively isolated populations, suggesting that the desert may make an effective barrier against gene flow. Finally, the control region shows four clades by the phylogenetic analyses, three of which are present in nearly all sampling populations. The observed pattern of the lineage mixing, also shown by the Cytb data, may be caused by extensive gene flow among populations, and could be explained by possible demographical expansion of the Yarkand hare during the late Pleistocene interglacial period.

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Section: Introductionmentioning

confidence: 98%

Habitat fragmentation affects genetic diversity and differentiation of the Yarkand hare

Xia

Zhang

et al. 2009

Conserv Genet

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“…Its eastern distribution limit is a rather gradual border, which is nowadays blurred due to plantations in the Alashan Gobi. The poplar is also found in the Chinese part of central Asia, but stands are threatened by increasing human land use (Bruelheide et al, 2003;Kürschner, 2004). In our working area only one stand was found; it comprised dozens of trees growing along a temporary river in an oasis at the north-western border of the Great Gobi B SPA.…”

Section: Salix Turranica-communitymentioning

confidence: 85%

Plant communities of the Great Gobi B Strictly Protected Area, Mongolia

2006

Mong. J. Biol. Sci.

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This paper presents the fi rst syntaxonomical overview of plant communities of the Great Gobi B Strictly Protected Area. Within Mongolia this region represents the south-westernmost protected area and preserves several species listed in the IUCN Red List. Therefore the region is of high importance to the country and moreover for the whole Central Asian eco-zone. Knowledge of the main habitat types is a precondition for nature conservation. Based on 211 vegetation samples collected during the summer of 2003 we derived 16 vegetation units. There are two mountainous communities; eight zonal semi-desert units, and the extra-zonal vegetation is assigned to six communities. The described vegetation units are compared with available descriptions from other Gobi regions.

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“…It is clear that the alteration of water resources in oases determines the processes of oasis evolution. Furthermore, the impacts of human activities on oasis evolution basically occurred as well just through direct or indirect influences of water resources in oases (Bruelheide et al 2000;Fan et al 2002;Zhang et al 2003).…”

Section: Introductionmentioning

confidence: 97%

Change detection of sandy land areas in Minfeng oasis of Xinjiang, China

Nasierding

Zhang

2008

Environ Monit Assess

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In recent years, much attention has been given to desertification in Xinjiang, China, particularly in the southern edge of the Taklimakan Desert. In this study, an oasis in Minfeng County, which is located in the southern edges of the Taklimakan Desert, was chosen as our case study area. Supervised classification for land types was conducted, and then the change detection and the trend of changes in sandy land areas were analyzed and compared. The results show that the area of sandy land has decreased in the region in the period of 1992-2001. The main change was between sandy land and sparse vegetation in the Desert-oasis ecotone. In addition, the change from woodland to grassland and/or arable land was quite obvious from 1992 to 2001. These changes would probably result in more fragile environment and higher potentiality in land desertification in the area.

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Characters of "traditional" and "modern" vegetation landscapes - a comparison of northern Morocco and southern Spain

Cited by 65 publications

References 8 publications

Habitat fragmentation affects genetic diversity and differentiation of the Yarkand hare

Habitat fragmentation affects genetic diversity and differentiation of the Yarkand hare

Plant communities of the Great Gobi B Strictly Protected Area, Mongolia

Change detection of sandy land areas in Minfeng oasis of Xinjiang, China

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