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Persistence of coastal vegetation in supratidal zones of northern China.

Yang H, Chu J - PLoS ONE (2013)

Bottom Line: Eight separate sandy coasts of the Shandong Peninsula were sampled, representing for disturbed and undisturbed sandy coasts.Plants growing on their supratidal zones were surveyed.On this basis, we compared the relative dominances, niche widths, and commonness of all species, and also analyzed species diversities of the coasts.

View Article: PubMed Central - PubMed

Affiliation: College of Resources and Environment, Qingdao Agricultural University, Chengyang, Qingdao, Shandong Province, China.

ABSTRACT
Coastal vegetation comprises a number of coastal specialists and terrestrial generalists. It remains unclear how they persist on disturbed and undisturbed coastal conditions. We tested the hypothesis that coastal specialists may be superior to terrestrial generalists on supratidal zones of coasts, but their superiority can be influenced by human disturbances. Eight separate sandy coasts of the Shandong Peninsula were sampled, representing for disturbed and undisturbed sandy coasts. Plants growing on their supratidal zones were surveyed. On this basis, we compared the relative dominances, niche widths, and commonness of all species, and also analyzed species diversities of the coasts. Coastal specialists were found to be more common and widespread on supratidal zones of the sandy coasts than terrestrial generalists haphazardly invading from hinterlands. Coastal specialists exhibited lower Sørensen dissimilarities than terrestrial generalists among the coasts. Tourist trampling seemed more detrimental than pond fishery to coastal vegetation. Relative to terrestrial generalists, coastal specialists responded to human disturbances more deterministically, with steady decreases in species diversities. These evidences verify that coastal specialists are intrinsically superior to terrestrial generalists on supratidal zones of coasts, especially of undisturbed coasts, because their dispersal among coasts adapts well to local storm surge regime. They also validate that human disturbances can depress the superiority of coastal specialists, partly by inducing invasion of terrestrial generalists.

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NMS ordination plot of plant communities on the eight sandy coasts.
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pone-0079964-g002: NMS ordination plot of plant communities on the eight sandy coasts.

Mentions: The NMS ordination plot vividly displays the community dissimilarities among the eight coasts, which were roughly classified into four groups, associated with their histories of human disturbances, instead of geographical positions (Figure 2, Table 2). One group included JN and HY, where tourist trampling was the weakest and pond fishery was also absent. Another group included MP and DSW, where pond fishery had appeared for many years. The third group included RC and DJT, which suffered moderate trampling. The fourth group included PL and LS, where citizens and tourists often gathered for recreating or swimming. As trampling got intensified, vegetation coverage was demoted to render more bare land, and species diversities changed (Table 2). Pond fishery also affected coastal vegetation, but their effects seemed not as serious as tourist trampling (Table 2).


Persistence of coastal vegetation in supratidal zones of northern China.

Yang H, Chu J - PLoS ONE (2013)

NMS ordination plot of plant communities on the eight sandy coasts.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3818275&req=5

pone-0079964-g002: NMS ordination plot of plant communities on the eight sandy coasts.
Mentions: The NMS ordination plot vividly displays the community dissimilarities among the eight coasts, which were roughly classified into four groups, associated with their histories of human disturbances, instead of geographical positions (Figure 2, Table 2). One group included JN and HY, where tourist trampling was the weakest and pond fishery was also absent. Another group included MP and DSW, where pond fishery had appeared for many years. The third group included RC and DJT, which suffered moderate trampling. The fourth group included PL and LS, where citizens and tourists often gathered for recreating or swimming. As trampling got intensified, vegetation coverage was demoted to render more bare land, and species diversities changed (Table 2). Pond fishery also affected coastal vegetation, but their effects seemed not as serious as tourist trampling (Table 2).

Bottom Line: Eight separate sandy coasts of the Shandong Peninsula were sampled, representing for disturbed and undisturbed sandy coasts.Plants growing on their supratidal zones were surveyed.On this basis, we compared the relative dominances, niche widths, and commonness of all species, and also analyzed species diversities of the coasts.

View Article: PubMed Central - PubMed

Affiliation: College of Resources and Environment, Qingdao Agricultural University, Chengyang, Qingdao, Shandong Province, China.

ABSTRACT
Coastal vegetation comprises a number of coastal specialists and terrestrial generalists. It remains unclear how they persist on disturbed and undisturbed coastal conditions. We tested the hypothesis that coastal specialists may be superior to terrestrial generalists on supratidal zones of coasts, but their superiority can be influenced by human disturbances. Eight separate sandy coasts of the Shandong Peninsula were sampled, representing for disturbed and undisturbed sandy coasts. Plants growing on their supratidal zones were surveyed. On this basis, we compared the relative dominances, niche widths, and commonness of all species, and also analyzed species diversities of the coasts. Coastal specialists were found to be more common and widespread on supratidal zones of the sandy coasts than terrestrial generalists haphazardly invading from hinterlands. Coastal specialists exhibited lower Sørensen dissimilarities than terrestrial generalists among the coasts. Tourist trampling seemed more detrimental than pond fishery to coastal vegetation. Relative to terrestrial generalists, coastal specialists responded to human disturbances more deterministically, with steady decreases in species diversities. These evidences verify that coastal specialists are intrinsically superior to terrestrial generalists on supratidal zones of coasts, especially of undisturbed coasts, because their dispersal among coasts adapts well to local storm surge regime. They also validate that human disturbances can depress the superiority of coastal specialists, partly by inducing invasion of terrestrial generalists.

Show MeSH
Related in: MedlinePlus