scholarly journals Demographics of an endangered coastal plant, Eryngium maritimum, near the northeast border of the distribution range in relation to clonal growth

2020 ◽  
Vol 18 (2) ◽  
Author(s):  
Baiba Ieviņa ◽  
Nils Rostoks ◽  
Naeem H. Syed ◽  
Andrew J. Flavell ◽  
Gederts Ievinsh

Abstract Genetic diversity among 13 northern populations of the declining coastal plant Eryngium maritimum L. at the northernmost extent of the species distribution range was studied using retro-transposon-based SSAP molecular markers. Diversity indices varied extensively among populations; some showing extremely low diversity whereas other populations exhibited moderate amounts of genetic variation. Differentiation among populations was highly variable as well. Interestingly, differentiation among northern populations was not influenced strongly by geographic distance. Closely situated populations were often more divergent than more distant populations suggesting other factors may be responsible for genetic structuring of E. maritimum populations. We propose that the following genetic and environmental factors combine together in a complex relationship to mould the present genetic structure of E. maritimum populations in this region: (1) historic biogeographical processes; (2) local environmental conditions at each site; (3) success of sexual reproduction and proportion of clonal propagation; (4) size of the population and influence of genetic drift; (5) level of fragmentation and isolation. Lastly, we suggest that the sustainable existence of Latvian populations is seriously threatened, unless recommended conservation measures are implemented.


2012 ◽  
Vol 11 (2) ◽  
pp. 137-156 ◽  
Author(s):  
N.I. Abramson ◽  
T.V. Petrova ◽  
N.E. Dokuchaev ◽  
E.V. Obolenskaya ◽  
A.A. Lissovsky

2017 ◽  
Vol 24 (2) ◽  
pp. 99 ◽  
Author(s):  
Hou Mian ◽  
Yu Guo-hua ◽  
Chen Hong-man ◽  
Liao Chang-le ◽  
Zhang Li ◽  
...  

2016 ◽  
Vol 1 (63) ◽  
pp. 95-101
Author(s):  
Ivan Suprun ◽  
◽  
Ilya Stepanov ◽  
Valentina Malyarovskaya ◽  
Tatyana Kolomiets ◽  
...  

Author(s):  
M.G.L. Mills ◽  
M.E.J. Mills

Most cheetah studies have been confined to mesic savannahs, yet much of its distribution range covers arid systems. The prime objective in this study was to examine the species’ adaptations to an arid region, to compare the results with those from other cheetah studies, especially from the Serengeti, and to analyse the data within the framework of carnivore population and behavioural ecology. The study was conducted in the Kgalagadi Transfrontier Park South Africa/Botswana, an area receiving 180–250 mm rainfall per year. Tracking spoor with the help of Bushmen trackers and continuous follows of 21 VHF radio-collared cheetahs were the main study methods used. These were supported by photographic records for individual identification, DNA studies for genetic aspects including paternity, and the use of doubly labelled water and the fitting of miniature data loggers for energetic studies. The statistical tests used to analyse the data are described.


2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Sookyung Shin ◽  
Jung-Hyun Kim ◽  
Ji-Hee Dang ◽  
In-Soon Seo ◽  
Byoung Yoon Lee

AbstractThe climate is changing rapidly, and this may pose a major threat to global biodiversity. One of the most distinctive consequences of climate change is the poleward and/or upward shift of species distribution ranges associated with increasing temperatures, resulting in a change of species composition and community structure in the forest ecosystems. The Baekdudaegan mountain range connects most forests from the lowland to the subalpine zone in South Korea and is therefore recognized as one of the most important biodiversity hotspots. This study was conducted to understand the distribution range of vascular plants along elevational gradients through field surveys in the six national parks of the Baekdudaegan mountain range. We identified the upper and lower distribution limits of a total of 873 taxa of vascular plants with 117 families, 418 genera, 793 species, 14 subspecies, 62 varieties, two forms, and two hybrids. A total of 12 conifers were recorded along the elevational gradient. The distribution ranges of Abies koreana, Picea jezoensis, Pinus pumila, and Thuja koraiensis were limited to over 1000 m above sea level. We also identified 21 broad-leaved trees in the subalpine zone. A total of 45 Korean endemic plant species were observed, and of these, 15 taxa (including Aconitum chiisanense and Hanabusaya asiatica) showed a narrow distribution range in the subalpine zone. Our study provides valuable information on the current elevational distribution ranges of vascular plants in the six national parks of South Korea, which could serve as a baseline for vertical shifts under future climate change.


Sign in / Sign up

Export Citation Format

Share Document