期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
套作油菜对杏-麦间作果园节肢动物群落影响初探 被引量:8
1
作者 汪飞 王虹 +5 位作者 徐遥 丁瑞丰 李号宾 郭文超 王东 毛尼牙孜.衣马木 《新疆农业科学》 CAS CSCD 2007年第4期453-456,共4页
对套种油菜的杏-麦果园和杏-麦间作果园节肢动物群落的初步系统研究表明,新疆南部绿洲荒漠生态区杏-麦间作果园节肢动物共计24种,隶属11目,21科。杏-麦间作果园套作蜜源植物(油菜)能够提高果园生态系统的生物多样性,显著增加天敌果园生... 对套种油菜的杏-麦果园和杏-麦间作果园节肢动物群落的初步系统研究表明,新疆南部绿洲荒漠生态区杏-麦间作果园节肢动物共计24种,隶属11目,21科。杏-麦间作果园套作蜜源植物(油菜)能够提高果园生态系统的生物多样性,显著增加天敌果园生态系统的稳定性以及节肢动物群落天敌亚群落。 展开更多
关键词 杏-麦间作果园 套作油菜 节肢动物群落 多样性和均匀度
下载PDF
Distribution Pattern of Dissolved Inorganic Nutrients and Phytoplankton Diversity in River Estuary, Kota Kinabalu Sabah, Malaysia
2
作者 Sujjat Al Azad Jiney Liow Fui San Ejria Saleh 《Journal of Geoscience and Environment Protection》 2022年第8期243-258,共16页
Nutrients are influenced by anthropogenic activities and consequently change the diversity and density of phytoplankton. The spatial distribution of dissolved inorganic nutrients and phytoplankton diversity and densit... Nutrients are influenced by anthropogenic activities and consequently change the diversity and density of phytoplankton. The spatial distribution of dissolved inorganic nutrients and phytoplankton diversity and density were determined in river estuary, Kota Kinabalu, Sabah, Malaysia. Samples of water and phytoplankton were collected from six locations of river estuary during the month of May 2019 to October 2019. The highest abundances of 86% diatoms were determined during the study period. This was followed by 13% and 1% of dinoflagellates and Cyanobacteria respectively. The most dominance species of Skeletonema costatum, with density of 1186.69 × 10<sup>3</sup> cells/L and Thalassiosira sp. (938.01 ×10<sup>3</sup> cells/L) were recorded from Station 1 (upstream) and Station 5 (mangrove area) respectively. The Chaetoceros sp. (84.25 × 10<sup>3</sup> cells/L) was the dominated in Station 6 (control site). Station 4 (residential area) accounted the highest diversity of species such as Skeletonema costatum, Thalassiosira sp., Peridinium sp., Gonyaulax sp., and Cylindrotheca sp. with total cell density of 142.98 × 10<sup>3</sup> cells/L. The high diversity index of 5.2 to 7.09 and evenness index of 1.81 to 2.87 were determined from this river estuary. Very poor relationship was observed with the cell density and dissolved inorganic nutrients, phosphate (R<sup>2</sup> = 0.2437), ammonium (R<sup>2</sup> = 0.301) and nitrate (R<sup>2</sup> = 0.406). The diversity and abundance of phytoplankton in this river estuary not only depend on nutrients, but might be associated with other environmental factors, tidal fluctuations and rate of discharge of nutrient inputs from surrounding areas. This study suggests that long term monitoring not only the nutrients, but discharges and flushing of nutrient during rainfall and tidal fluctuation together with environmental factors should be considered in order to conclude status on the diversity and abundance of phytoplankton in river estuary. 展开更多
关键词 River Estuary NUTRIENTS Phytoplankton Abundance diversity and evenness
下载PDF
宁夏大罗山主要植被类型植物物种多样性分析 被引量:13
3
作者 徐秀梅 《宁夏农学院学报》 1997年第3期39-46,共8页
本文在研究大罗山种子植物区系特征的基础上,应用物种多样性的Shannon—Wiener指数,均匀度、生态优势度指标,测定了大罗山4个主要植被类型的植物物种多样性指标,分析了大罗山主要植物类型的结构特征和生态环境。
关键词 种子植物区系 物种多样性 群落均匀度 宁夏
下载PDF
城市残存鼠生态特征——Ⅰ.城市残存鼠群落特征的研究 被引量:3
4
作者 祝龙彪 周玉丽 《中国媒介生物学及控制杂志》 CAS CSCD 1990年第6期350-352,共3页
本文报道在城市灭鼠达标后鼠密度很低的状态下,连续18个月对不同建筑物类型的住宅区,住房内的不同场所以及工厂、企业、宾馆的不同环境点的残存鼠群落结构进行了调查,用Shannon-weaner及pielou公式计算分析了城市残存鼠群落的物种多样... 本文报道在城市灭鼠达标后鼠密度很低的状态下,连续18个月对不同建筑物类型的住宅区,住房内的不同场所以及工厂、企业、宾馆的不同环境点的残存鼠群落结构进行了调查,用Shannon-weaner及pielou公式计算分析了城市残存鼠群落的物种多样性指数和均匀度。 展开更多
关键词 残存鼠 鼠类 生态学 群落特征 城市
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部