1.Niche which many ecologists have become interested in is an important concept in ecology. The main definitions of niche are the habitat niche of Grinnell (1917), the functional niche of Elton (1933) and the hypervolume niche of Hutchinson (1957) whose concept has by far the largest influence on niche.
生态位(niche)是生态学的一个重要概念,许多生态学家都对生态位下了定义,主要有Grinnell(1917)的生境生态位,Elton(1933)的功能生态位,Hutchinson(1957)的超体积生态位,尤以Hutchinson的“超体积生态位”影响为大。
2.Based on the niche ecostate-ecorole theory proposed by Chunquan Zhu, we improved the model of regeneration niche, regarding the niche of the arbor tree and the sapling as the ecostate and the ecorole of the regeneration niche.
摘要根据朱春全提出的态势理论对更新生态位宽度和更新生态位重叠公式进行改进，分别以林隙大乔木和小径木的生态位作为更新生态位的态和势来计算动态的森林更新生态位。
3.The study on the temporal niche,spatial niche and spatial distribution of dominant grub populations in different athletic areas of golf courses in subtropics showed that except the lower temporal niche breadths of individual grubs in greens Ⅲ and Ⅳ,the dominant grub populations in 4 areas of fairways and greens all had a >0.9 temporal niche breadth.
研究了亚热带高尔夫球场不同功能区优势种蛴螬种群空间分布及时间和空间的生态位 . 结果表明 ,球场 4种优势种草地蛴螬时间生态位宽度几乎均在 0 9以上 (除果岭Ⅲ区及Ⅳ区个别蛴螬种外 ) ,其中短草高地和果岭Ⅰ、Ⅱ区中 4种蛴螬时间生态位宽度均最大 ,长草高地和果岭Ⅳ区的时间生态位宽度则最低 .
4.Associated tree had rather broad muli-niche breadth niche and then its multi-niche overlap had rather big.
多维生态位较宽的物种，其与毛竹的多维生态位重叠也较大。
5.The results indicated that the Shannon-Wiener’s niche breadth and Levins’s niche breadth of 23 dominant species in the communities were 0.4049—0.7736 and 0.0551—0.3086, respectively. The species with larger niche breadth were Acronychia pedunculata, Gordonia axillaris, Aporosa dioica, Microdesmis casearifolia, Gironniera subaequalis, and Sterculia lanceolata, which were the widespread species in natural forests.
结果表明:珠海次生林群落23个优势种的Shannon-Wiener生态位宽度和Levins生态位变度值范围为0.4049～0.7736和0.0551～0.3086,生态位宽度较大的种类分别是山油柑(Acronychia pedunculata)、大头茶(Gordonia axillaris)、银柴(Aporosa dioica)、小盘木(Microdesmis casearifolia)、白颜树(Giron-niera subaequalis)和假苹婆(Sterculia lanceolata);
6.The niche proportional similarity and the niche overlap index reflect the niche characteristics of the evergreen broadleaf trees in subtropical forest.
结果表明:组成米槠林群落的优势种群绝大多数为广生态位,种群之间关系复杂,对资源具有一定的共享性。
7.3. According to the date from April 20 July 18 in 2004, it was studied that the time niche, space niche and the two_dimensional niche, the overlap value stated that the dominant natural enemies were Pardosa astrigera , Erigonidium graminicolum , Oedothorax feminea to Plutella maculipennis Curtis , Vegetable Aphides.
3.本文根据2004年4月20日到7月18日的调查数据,对甘蓝田蜘蛛、昆虫群落的时间生态位、空间生态位、时—空生态位进行研究。 从其重叠值来看,对于害虫小菜蛾、桃蚜、甘蓝蚜、萝卜蚜来讲,星豹蛛、草间小黑蛛、阴瘤胸蛛是其最优天敌。
8.This paper puts forw ard the concept of the enterprise niche and analyzes the implications and measurements of enterprise niche breadth and overlap, using niche theories.
摘要本文提出了企业生态位的概念，并运用生态位理论对企业生态位宽度和企业生态位重叠的内涵、测度作了尝试性的探索。
9.Enterprise can realize niche symbiosis through niche separation in order to avoid excessive competition due to niche overlap.
企业可以通过生态位分离来实现生态位共生，从而避免由于生态位的严重重叠而引起的过度竞争。
10.This niche genetic algorithm (NGA) based on a practical niche operator was provided with a perfect global convergence.
提出一种实用的生态算子 ,构建的生态遗传新算法有效解决了基本遗传算法的“早熟”问题 .
