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secondary forest 【林業】再生林。

secondary gas

Based on the investigation on the structure and niches of secondary forests in jiulongkeng , guangze , fujian province , the distribution law was studied and natural succession tendency was worked out for primary arbors and shrubs in different slope direction , which provides scientific fundamental for artificial stimulating natural regeneration 摘要通過對福建光澤九龍坑不同坡向天然次生林的林分組成和生境的調查,研究主要喬灌木樹種在不同坡向林分中的分布規律,分析出不同坡向林分的天然演替趨勢,為人工促進天然更新提供科學依據。

3 . there exists community organizer during the process of secondary foresrt birds community forming pied magpie is one of the community organizers in secondary forest , it mainly influences the raptors community structure , and influences large bird guilds that nesting on ground and cavity - nesting birds indirectly , thereby it influences the whole birds community structure 3 、次生林鳥類群落結構形成中有群落組織者的存在喜鵲是次生林中的群落組織者之一,主要影響猛禽群落的形成猛禽群落組成的變化,又間接影響次生林中的營地面巢的大型鳥類和營洞巢的大型鳥類群落構成,從而對整個群落的組成產生影響。

By studying the birds composition , quantity , species diversity and evenness , consumer biomass of community ; feeding niche , gathering and encountering probability of birds , we illustrate the characteristics of mountainous secondary forests wintering birds community in temperate zone in northeast china , and the changing trends and the relation with environments of birds community for 12 years fore - and - aft 通過對群落內鳥類組成及數量、種的多樣性和均勻性及消費生物量、鳥類的取食生態位,鳥類的集群及種間相遇幾率等方面的研究,基本闡明了溫帶環境中我國北方山地次生闊葉林冬季鳥類群落結構的特點,以及12年前后其鳥類群落結構的變化趨勢、與環境變化的關系等。

The paper establishes a ecological transect , with a length of 90 km and width of 16 km , utilizing the part of tm data on 16th august 1998 , from harbin to the natural secondary forests in maoershan , heilongjiang province . with supervised classification , the tm data which had been corrected and enhanced via erdas , combining the data of gps in the field , was classified by seven types including : residential area , glebe , paddy field 本論文利用1998年8月16日的tm衛星數據的一部分,設置從黑龍江省哈爾濱市到帽兒山天然次生林區,長90km ,寬16km的生態研究樣帶。通過用erdas對衛星數據的校正、圖像增強等處理,結合gps野外實地調查數據,進行有監督分類。共分為7種類型:居民點、旱田、水田、河流、灌叢、闊葉林、針葉林,并建立了衛星影像分類解譯標志。

The life - form spectrum , plant kinds , vertical structure and horizontal structure of oka nutural secondary forest in baotianman national reserve were preliminary analyzed , which has produced the more conjecture : the vertical distribution in the area is obvious ; the kinds of phanphytes plants in the community is the most ; the q . variabilis and q . variabilis are on predominance ground 摘要對寶天曼自然保護區櫟類天然次生林群落的生活型譜、種類組成、垂直結構和水平結構進行了初步分析,并由此進一步推測:該地區植物群落垂直分布較明顯;群落中高位芽植物最多,占61 . 6 % ;栓皮櫟和銳齒櫟在群落中正處于優勢地位。

The higher landscape heterogeneity , the closer to nature secondary forest . along the gradient , landscape congregation index exhibits descendent tendency , showing a significant relationship between the extent of patch mosaic and the extent of disturbance , according to changes of landscape mean shape index ( lmsi ) and landscape mean fractal dimension index , integrated disturbance ( nature disturbance , human activities , vegetational inner succession or population dynamics ) tend to enhance 景觀聚集度指數是隨著梯度區呈下降的變化趨勢,表明斑塊之間的鑲嵌聯系的程度與受到的干擾程度有極為重要的關系。從景觀平均形狀指數和景觀平均分維數的變化,可看出綜合干擾(自然干擾、人為活動、植被的內源演替或種群的動態變化)是呈增強的發展趨勢。

The proportions of large , middle and small patches were small patch > middle patch > large patch in all gradient zones . from suburbs to secondary forests , the area ratio of middle and small patches was increased , but that of large patches was significantly decreased 大、中、小斑塊的數量比例在各梯度區之間都是小斑塊數量比中斑塊數量比大斑塊數量比。沿城區到天然次生林區方向,中小斑塊的面積百分比逐漸增大,而大斑塊則呈明顯的下降趨勢。

Studies on population ecology showed that d . versipellis is able to grow on the hillsides of subtropical broadleaf or acicularleaf secondary forest where soil is fertile and the content of n , p , k is high and the ph is 5 . 49 - 6 . 59 種群生態研究表明八角蓮適宜生長的土壤為中性偏酸( ph5 . 49 6 . 59 ) 、有機質含量為7 . 34 33 . 33和n 、 p 、 k養分含量高的黃棕壤;其生長環境的植被為亞熱帶針葉混交林,伴生植物多為當地優勢種。

2 . the birds use resources in guilds in secondary forests the birds can be divided into 7 guilds in zuojia secondary forests according to foraging habitat and height , thertby they can use the foraging space and resources efficiency 2 、次生林鳥類以集團形式對各種資源進行利用根據取食生境及高度,左家次生林繁殖鳥類群落分為7個取食集團,從而有效對生境中的取食空間和食物資源進行利用。

The mountains are covered with virgin secondary forests , dove trees , ginkgoes , metasequoias , and other rare trees and flowers . rhesus monkeys , civets , tragopans , golden pheasants , and other rare animals and birds are active in the forests 這里擁有成片的原始次生林,珙桐銀杏水杉蝦花等奇花異卉漫山遍野,還有獼猴靈貓角雉錦雞等珍禽異獸出沒其間

The species diversity of the forest in this area is richer than in other secondary forests in the same region , which reveals that the community was disturbed moderately before 野外調查結果表明,該群落的組成與結構比較復雜,群落的區系組成以落葉闊葉樹種為主,顯示出由中亞熱帶向北亞熱帶過渡性植被地段次生群落的特征。

The secondary forest breeding use birds nest - site resources vertically , they can be divided into nesting in tree coronal layer guild , nesting on tree trunk guild , nestig in the under forest layer guild 次生林繁殖鳥類對巢址資源呈現空間上的垂直利用現象,可分為樹冠層營巢、樹干上營巢和林下層營巢繁殖集團。

The vegetation structure of secondary forest influences the species composition and quantity of avian community , but which is different in different guilds 次生林的植被結構影響鳥類群落的種類組成和數量,但對不同類群的鳥類影響的程度不同。

In hong kong , the original forest cover was cleared centuries ago , and now only secondary forest is left following the 1945 reforestation programme 在香港,原始森林早于數百年前已被夷平,繼1945年開展的植林計劃,現時本港只剩下次生林。

Its natural wonders include limestone caves , hot springs , bizarre rock formations , tea terraces and primeval secondary forests 公園中既有珙桐桫欏等珍稀植物,又有溶洞溫泉奇石茶山原始次森林等自然景觀。

The temporal - spatial distribution of temperature on the surface roughness of the tropical secondary forest gap in xishuangbanna , yunnan province 西雙版納熱帶次生林林窗近地層溫度時空分布特征

Analysis on succession trend and physiological characters of secondary forest tree species in limestone mountain of eastern anhui province 皖東石灰巖山地次生林演替趨勢與樹種的生理特性分析

Operation process and effect analysis of the method of planting conifers and protecting broad - leaves trees used in secondary forests rechange 次生林改造中栽針保闊途徑的工藝過程及效果分析

Woods near old villages and temples and the secondary forests provide important habitats for many woodland birds 古老鄉村和廟宇附近的傳統風水樹林及次生林,是許多雀鳥的重要棲息地。