A total of 862 benthic species were identified in the island intertidal zone in Fujian, of which 734 species are animals and 128 species algae. Determination of Jaccard's similarity index of species was made on th...A total of 862 benthic species were identified in the island intertidal zone in Fujian, of which 734 species are animals and 128 species algae. Determination of Jaccard's similarity index of species was made on the intertidal communities around 11 major islands. Based on hierarchical clustering (WPGMA) and polar ordination, the benthic communities may be classified into three types; the estu-arine type, the bay and harbour type and open sea type. The distribution of the benthic community is related to the location of the island and its habitats of which, salinity and hydrodynamics are the major factors controlling the distribution of the communities.展开更多
The intertidal zone (also known as seashore) are transition areas between land and sea, that are greatly influenced by the tide cycle, therefore, environmental parameters, such as temperature and salinity, oscillate a...The intertidal zone (also known as seashore) are transition areas between land and sea, that are greatly influenced by the tide cycle, therefore, environmental parameters, such as temperature and salinity, oscillate according to the periods in which these areas are exposed to air. Intertidal zones are highly diverse, which makes them key ecosystems for the development of sea life (both flora and fauna) exposed to drastic environmental change. The <span style="white-space:normal;font-size:10pt;font-family:;" "="">59 visual censuses campaigns were carried out during the full moon of each month from 2015 to 2019. Temperature, salinity and dissolved oxygen were recorded during each visual census and showed variations between years. Temperature showed two distinct seasons, warm and cold. A total of 14,995 organisms were recorded, belonging to 30 species, 28 genera, 15 families, five orders and one class. Ecological indices like species richness (SR), Shannon-Wiener’s diversity (H') and Fisher’s alpha (</span><i style="white-space:normal;"><span style="font-size:10pt;font-family:;" "="">α</span></i><span style="white-space:normal;font-size:10pt;font-family:;" "="">-Fisher) showed significant differences between years, 2015 and 2016 recorded as the most diverse years, while the lowest values were recorded in 2019. Therefore, fish communities of tide pools showed to be highly diverse, with 30 species recording similar relative abundances, and according to the BVI, only 11 species were dominant. Spatio-temporal variations of temperature, salinity and dissolved oxygen were highly </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">cor</span><span style="white-space:normal;font-size:10pt;font-family:;" "="">related </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">to</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> changes in fish community structure, and the dominance of certain species, which are of great importance for the structure and dynamic of the tide pool communities.</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> Therefore, the aim of the present study was to determine the fish community structure of tide pools during the low tide in the intertidal zone of a locality known as El Faro, on the west coast of La Paz, B. C. S., Mexico.</span>展开更多
Sampling investigation in Xiamen intertidal zone during spring indicated that waders were the main components of intertidal avian communities and 44.4% of the components of intertidal avian communities were composed b...Sampling investigation in Xiamen intertidal zone during spring indicated that waders were the main components of intertidal avian communities and 44.4% of the components of intertidal avian communities were composed by shorebirds (charadriiformes). Among populations, Tringa totanus, Charadrius dubius, Charadrius leschenaultii, Egratta garzetta and Hirundo rustica were more common than other species. The structure of bird communities in each sampling area was analyzed, and the similarity between communities was studied by using cluster analysis method. The results demonstrated that the avian communities in Xiamen intertidal zone might be classified into three types and the community similarity was related to the intertidal base. Also, the influential factors of community diversity and the economic significance of the birds in Xiamen intertidal zone were discussed.展开更多
文摘A total of 862 benthic species were identified in the island intertidal zone in Fujian, of which 734 species are animals and 128 species algae. Determination of Jaccard's similarity index of species was made on the intertidal communities around 11 major islands. Based on hierarchical clustering (WPGMA) and polar ordination, the benthic communities may be classified into three types; the estu-arine type, the bay and harbour type and open sea type. The distribution of the benthic community is related to the location of the island and its habitats of which, salinity and hydrodynamics are the major factors controlling the distribution of the communities.
文摘The intertidal zone (also known as seashore) are transition areas between land and sea, that are greatly influenced by the tide cycle, therefore, environmental parameters, such as temperature and salinity, oscillate according to the periods in which these areas are exposed to air. Intertidal zones are highly diverse, which makes them key ecosystems for the development of sea life (both flora and fauna) exposed to drastic environmental change. The <span style="white-space:normal;font-size:10pt;font-family:;" "="">59 visual censuses campaigns were carried out during the full moon of each month from 2015 to 2019. Temperature, salinity and dissolved oxygen were recorded during each visual census and showed variations between years. Temperature showed two distinct seasons, warm and cold. A total of 14,995 organisms were recorded, belonging to 30 species, 28 genera, 15 families, five orders and one class. Ecological indices like species richness (SR), Shannon-Wiener’s diversity (H') and Fisher’s alpha (</span><i style="white-space:normal;"><span style="font-size:10pt;font-family:;" "="">α</span></i><span style="white-space:normal;font-size:10pt;font-family:;" "="">-Fisher) showed significant differences between years, 2015 and 2016 recorded as the most diverse years, while the lowest values were recorded in 2019. Therefore, fish communities of tide pools showed to be highly diverse, with 30 species recording similar relative abundances, and according to the BVI, only 11 species were dominant. Spatio-temporal variations of temperature, salinity and dissolved oxygen were highly </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">cor</span><span style="white-space:normal;font-size:10pt;font-family:;" "="">related </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">to</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> changes in fish community structure, and the dominance of certain species, which are of great importance for the structure and dynamic of the tide pool communities.</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> Therefore, the aim of the present study was to determine the fish community structure of tide pools during the low tide in the intertidal zone of a locality known as El Faro, on the west coast of La Paz, B. C. S., Mexico.</span>
文摘Sampling investigation in Xiamen intertidal zone during spring indicated that waders were the main components of intertidal avian communities and 44.4% of the components of intertidal avian communities were composed by shorebirds (charadriiformes). Among populations, Tringa totanus, Charadrius dubius, Charadrius leschenaultii, Egratta garzetta and Hirundo rustica were more common than other species. The structure of bird communities in each sampling area was analyzed, and the similarity between communities was studied by using cluster analysis method. The results demonstrated that the avian communities in Xiamen intertidal zone might be classified into three types and the community similarity was related to the intertidal base. Also, the influential factors of community diversity and the economic significance of the birds in Xiamen intertidal zone were discussed.
