The paper reported the results of avian survey in the mangrove wetland of Dongzhaigang from 1997 to 1998.It showed that 78 species of birds were recorded,and belong to 12 orders 26 families.Of these birds,35 species a...The paper reported the results of avian survey in the mangrove wetland of Dongzhaigang from 1997 to 1998.It showed that 78 species of birds were recorded,and belong to 12 orders 26 families.Of these birds,35 species and 43 species were migratory birds and resident birds respectively. 9 species were secone class nationaly protected birds;32 species were on the list of China-Japan Agreement for Protection of Migratory Birds;14 species were on the list of China Australia Agreement for Protection of Migratory Birds.The number of bird species varied with seasons.The trends were winter>autumn>spring>summer on upland,respectively.The avian diversity index and evenness index were greater on upland than on mudflat in summer.The avian diversity index was greater and the avian evenness index was less on mudflat than on upland in autumn.The avian diversity index and evenness index were greater on mudflat than upland in winter.展开更多
In order to study the feasibility of using mangrove wetland as a facility for sewage treatment and the effects of wastewater discharge on soil and plants of the mangrove ecosystem,the field work was conducted during D...In order to study the feasibility of using mangrove wetland as a facility for sewage treatment and the effects of wastewater discharge on soil and plants of the mangrove ecosystem,the field work was conducted during December 1994 to December 1995 in a mangrove wetland in Futian national nature reserve in Shenzhen. Two parallel elongated sites (sites A and B, each 180m×10m) stretching from land to sea were chosen for study. Since December 1994, Site A was continuously irrigated with municipal sewage every two days,while Site B served as a control. The ecological impact of sewage discharge on the mangrove wetland was assessed by comparing the plant growth, nutrients of soils and vegetation between Site A and Site B. One year later, total-N and NH 4 +-N in the soil increased and EC decreased significantly at Site A. And obvious changes in pH value and other nutrient contents in the soil of Site A could be detected. However, the nutrient contents of the leaves of the dominant plants collected from Site A and B were very close and no significant difference in terms of tree height and diameter and biomass was found between the two sites.展开更多
文摘The paper reported the results of avian survey in the mangrove wetland of Dongzhaigang from 1997 to 1998.It showed that 78 species of birds were recorded,and belong to 12 orders 26 families.Of these birds,35 species and 43 species were migratory birds and resident birds respectively. 9 species were secone class nationaly protected birds;32 species were on the list of China-Japan Agreement for Protection of Migratory Birds;14 species were on the list of China Australia Agreement for Protection of Migratory Birds.The number of bird species varied with seasons.The trends were winter>autumn>spring>summer on upland,respectively.The avian diversity index and evenness index were greater on upland than on mudflat in summer.The avian diversity index was greater and the avian evenness index was less on mudflat than on upland in autumn.The avian diversity index and evenness index were greater on mudflat than upland in winter.
文摘In order to study the feasibility of using mangrove wetland as a facility for sewage treatment and the effects of wastewater discharge on soil and plants of the mangrove ecosystem,the field work was conducted during December 1994 to December 1995 in a mangrove wetland in Futian national nature reserve in Shenzhen. Two parallel elongated sites (sites A and B, each 180m×10m) stretching from land to sea were chosen for study. Since December 1994, Site A was continuously irrigated with municipal sewage every two days,while Site B served as a control. The ecological impact of sewage discharge on the mangrove wetland was assessed by comparing the plant growth, nutrients of soils and vegetation between Site A and Site B. One year later, total-N and NH 4 +-N in the soil increased and EC decreased significantly at Site A. And obvious changes in pH value and other nutrient contents in the soil of Site A could be detected. However, the nutrient contents of the leaves of the dominant plants collected from Site A and B were very close and no significant difference in terms of tree height and diameter and biomass was found between the two sites.
