Spatial distribution patterns are associated with life history and behavioral adaptations of animals. For studying the spatial distribution pattern of the steppe toad-headed lizard(Phrynocephalus frontalis) and its in...Spatial distribution patterns are associated with life history and behavioral adaptations of animals. For studying the spatial distribution pattern of the steppe toad-headed lizard(Phrynocephalus frontalis) and its influencing factors,we conducted experiments in Hunshandake Sandy Land in Inner Mongolia,China in July 2009. By calculating the clustered indices,we found that the lizard was aggregately distributed when the sampling quadrat was smaller than 10 m × 10 m,and uniformly distributed when it was greater than 10 m × 10 m. The Nearest Neighbor Rule showed a clustering distribution pattern for P. frontalis and the distribution pattern was quadrat-sampling dependent. Furthermore,the cluster was determined by environmental factors when the sampling quadrat was smaller than 20 m × 20 m,but it was determined by both environmental factors and characteristics of the lizard when it was larger than 20 m × 20 m. Our results suggested that the steppe toad-headed lizards tended to aggregate into suitable habitat patches in desert areas. Additionally,we discussed that the lizard aggregation could be potentially used as an indictor of movement of sand dunes.展开更多
Thondaimanaru lagoon (TL) is one of the three lagoons in the Jaffna Peninsula, Sri Lanka. TL (N-9.819584, E-80.134086), which is 74.5 Km2. Fringing these lagoons are mangroves, large tidal flats and salt marshes. The ...Thondaimanaru lagoon (TL) is one of the three lagoons in the Jaffna Peninsula, Sri Lanka. TL (N-9.819584, E-80.134086), which is 74.5 Km2. Fringing these lagoons are mangroves, large tidal flats and salt marshes. The present study is carried out to assess the diversity of gastropods in the northern part of the TL. The sampling of gastropods was performed by using quadrat method from July 2015 to June 2016. Different sites were selected and rainfall data, water temperature, salinity of the water and GPS values were collected. Collected gastropod shells were classified using standard taxonomic keys and their morphological as well as morphometrical characteristics were analyzed. A total of 23 individual gastropods were identified from the lagoon which belongs to 21 genera of 15 families among them 11 gastropods were identified up to species level.展开更多
基金financially supported by the Knowledge Innovation Project of the Chinese Academy of Sciences(KSCX2-EW-J-2,KSCX2-EW-Z-4)the State Key Basic Research and Development Program of China(2007CB106801)
文摘Spatial distribution patterns are associated with life history and behavioral adaptations of animals. For studying the spatial distribution pattern of the steppe toad-headed lizard(Phrynocephalus frontalis) and its influencing factors,we conducted experiments in Hunshandake Sandy Land in Inner Mongolia,China in July 2009. By calculating the clustered indices,we found that the lizard was aggregately distributed when the sampling quadrat was smaller than 10 m × 10 m,and uniformly distributed when it was greater than 10 m × 10 m. The Nearest Neighbor Rule showed a clustering distribution pattern for P. frontalis and the distribution pattern was quadrat-sampling dependent. Furthermore,the cluster was determined by environmental factors when the sampling quadrat was smaller than 20 m × 20 m,but it was determined by both environmental factors and characteristics of the lizard when it was larger than 20 m × 20 m. Our results suggested that the steppe toad-headed lizards tended to aggregate into suitable habitat patches in desert areas. Additionally,we discussed that the lizard aggregation could be potentially used as an indictor of movement of sand dunes.
文摘Thondaimanaru lagoon (TL) is one of the three lagoons in the Jaffna Peninsula, Sri Lanka. TL (N-9.819584, E-80.134086), which is 74.5 Km2. Fringing these lagoons are mangroves, large tidal flats and salt marshes. The present study is carried out to assess the diversity of gastropods in the northern part of the TL. The sampling of gastropods was performed by using quadrat method from July 2015 to June 2016. Different sites were selected and rainfall data, water temperature, salinity of the water and GPS values were collected. Collected gastropod shells were classified using standard taxonomic keys and their morphological as well as morphometrical characteristics were analyzed. A total of 23 individual gastropods were identified from the lagoon which belongs to 21 genera of 15 families among them 11 gastropods were identified up to species level.
