In undertaking regular surveys on those waterbirds appearing on Fujian coast and on offshore islands,people of Xiamen Bird-watching Society had observed,for five times during 2007-2009,three marked individuals of the ...In undertaking regular surveys on those waterbirds appearing on Fujian coast and on offshore islands,people of Xiamen Bird-watching Society had observed,for five times during 2007-2009,three marked individuals of the Roseate Tern (Sterna dougallii) on Caiyu Archipelago of south Fujian offshore; it is now quite certain that the leg-flags were marked on birds by people of the Australasian Wader Studies Group (AWSG) and at least one of those leg-flagged terns is already over six or seven years old by the time of re-sighting; this record might be useful and helpful for further estimating the life circle as well as the length of generation of those gulls and terns appearing and breeding along the SE Chinese coast,such as the Black-tailed Gull (Larus crassirostris),the Great Crested Tern (Sterna bergii),the Chinese Crested Tern (S.bernsteini),etc.展开更多
By studying the structural characteristics and carbon storage of the mangrove island ecosystem in the Beibu Gulf,this study provides a scientific basis for mangrove ecological compensation in the coastal areas of Guan...By studying the structural characteristics and carbon storage of the mangrove island ecosystem in the Beibu Gulf,this study provides a scientific basis for mangrove ecological compensation in the coastal areas of Guangxi,South China Sea.On the basis of the unmanned aerial vehicle remote sensing images and a sample plot survey,the object-oriented multi-scale segmentation algorithm is used to extract the mangrove community type information,and one-way analysis of variance is conducted to analyse the structural characteristics of the mangrove community.The carbon storage and carbon density of different mangrove ecosystems were obtained based on the allometric growth equation of mangrove plants.The analysis yielded four main results.(1)The island group covers about 27.10 ha,41.32%(11.20 ha)of which represents mangrove areas.The mangrove forest is widely distributed in the tidal flats around the islands.(2)The main mangrove types were Aegiceras corniculatum,Kandelia obovata+Aegiceras corniculatum,Avicennia marina+Aegiceras corniculatum and Avicennia marina communities.(3)Amongst the mangrove plants,Avicennia marina had the highest biomass(18.52 kg plant^(–1)),followed by Kandelia obovata(7.84 kg plant^(–1))and Aegiceras corniculatum(3.85 kg plant^(–1)).(4)The mangrove carbon density difference was significant.Kandelia obovata had the highest carbon density(148.03 t ha^(–1)),followed by Avicennia marina(104.79 t ha^(–1))and Aegiceras corniculatum(99.24 t ha^(–1)).The carbon storage of the mangrove island ecosystem was 1194.70 t,which was higher than in other areas with the same latitude.The carbon sequestration capacity of the mangrove was relatively strong.展开更多
文摘In undertaking regular surveys on those waterbirds appearing on Fujian coast and on offshore islands,people of Xiamen Bird-watching Society had observed,for five times during 2007-2009,three marked individuals of the Roseate Tern (Sterna dougallii) on Caiyu Archipelago of south Fujian offshore; it is now quite certain that the leg-flags were marked on birds by people of the Australasian Wader Studies Group (AWSG) and at least one of those leg-flagged terns is already over six or seven years old by the time of re-sighting; this record might be useful and helpful for further estimating the life circle as well as the length of generation of those gulls and terns appearing and breeding along the SE Chinese coast,such as the Black-tailed Gull (Larus crassirostris),the Great Crested Tern (Sterna bergii),the Chinese Crested Tern (S.bernsteini),etc.
基金The Guangxi Science and Technology Base and Talent Project(GuikeAD19245041,2019AC20088)The Guangxi Key Research and DevelopmentProgram(AA18118038)The Project to Improve the Basic Research Ability of Young and Middle-Aged Teachers in Guangxi Universities(2020KY09021,2019KY0426).
文摘By studying the structural characteristics and carbon storage of the mangrove island ecosystem in the Beibu Gulf,this study provides a scientific basis for mangrove ecological compensation in the coastal areas of Guangxi,South China Sea.On the basis of the unmanned aerial vehicle remote sensing images and a sample plot survey,the object-oriented multi-scale segmentation algorithm is used to extract the mangrove community type information,and one-way analysis of variance is conducted to analyse the structural characteristics of the mangrove community.The carbon storage and carbon density of different mangrove ecosystems were obtained based on the allometric growth equation of mangrove plants.The analysis yielded four main results.(1)The island group covers about 27.10 ha,41.32%(11.20 ha)of which represents mangrove areas.The mangrove forest is widely distributed in the tidal flats around the islands.(2)The main mangrove types were Aegiceras corniculatum,Kandelia obovata+Aegiceras corniculatum,Avicennia marina+Aegiceras corniculatum and Avicennia marina communities.(3)Amongst the mangrove plants,Avicennia marina had the highest biomass(18.52 kg plant^(–1)),followed by Kandelia obovata(7.84 kg plant^(–1))and Aegiceras corniculatum(3.85 kg plant^(–1)).(4)The mangrove carbon density difference was significant.Kandelia obovata had the highest carbon density(148.03 t ha^(–1)),followed by Avicennia marina(104.79 t ha^(–1))and Aegiceras corniculatum(99.24 t ha^(–1)).The carbon storage of the mangrove island ecosystem was 1194.70 t,which was higher than in other areas with the same latitude.The carbon sequestration capacity of the mangrove was relatively strong.
