Microhabitat variety shows significant effects on plant morphological performances. To understand adaptation strategy of alpine species to resources heterogeneity, response of biomass allocation and morphological characteristics to nutrient and light heterogeneity were studied for three component species (Saussurea macrota, Salvia przewalskii and Senecio scandens) in alpine meadow of the Qinghai-Tibetan Plateau.

為了解高寒植物幼苗對生境資源異質(zhì)性的適應(yīng)策略可以进的黄网站，以高寒草甸中常見的3種草本植物大耳葉風(fēng)毛菊国产情侣A片A毛片、甘西鼠尾草和千里光為材料最新亚洲第一页，比較研究了這3種植物幼苗對不同光照和養(yǎng)分資源的響應(yīng)国产精品亚洲日韩欧美第一页。

The carbon isotope composition of single alkanes (δ13Cia) in two plants (Leontopodium leontopodioidies and Taraxacum mongolicum ) growing in the northeastern Qinghai-Tibet plateau was analyzed by means of GC-IMS in order to know its relationship with altitude,and furthemore, to gain new data for the research on climatic changes.

用色譜—同位素質(zhì)譜儀對青藏高原東北部高寒草甸生態(tài)系統(tǒng)中的兩種高等植物—火絨草和蒲公英的烷烴進(jìn)行分析一级a毛片免灵靠看久久精品，討論環(huán)境因素對植物單體烷烴碳同位素組成（δ13Cia）的影響。

The result indicated that: with the change of ecological factors and intensification of human activities,strong stability of grassland community structure of the local alpine meadow type along the highway in this region was found,proportion of medium xerophilous国产原创自拍、rhizomous grass increased;alpine grassland community had relatively low stability,grassland community successed naturally to adapt to the new environment;...

結(jié)果顯示：隨著生態(tài)因子發(fā)生變化和人類活動的加劇黄色视频一区二区观看，該區(qū)公路沿線高寒草甸類草地群落結(jié)構(gòu)表現(xiàn)出了較強的穩(wěn)定性，中旱生耐旱的根莖型禾草比重有所增加一级α片屄；高寒草原植物群落穩(wěn)定性相對較差欧美精品黄一区，草地群落為適應(yīng)新的生境而發(fā)生了自然演替；沼澤化草甸亞類草地植物群落中群落伴生種的種類增加操干无码在线视频，優(yōu)勢種嵩草屬植物在群落中的比重有所下降很在线视频无码一二三四区。

Sympegma regelii community, a rangeland desert vegetation, has the highest Shannon-Winner species diversity indices (1.706); the communities of Haloxylon ammodendron and Ephedra przewalskii, which have obvious feature of desert vegetation, are in the middle in species diversity indices (0.875-0.890); the communities of Calligonum mongolicum, Populus euphratica, Tamarix ramosissima and Glycyrrhiza inflata, characterized by desert forest of which saline desert bushes and saline meadows are scattered in the communities, have lowest value of the species diversity indices (0.079-0.495). 3 The structure of desert plant community is dominated by the bush layer. The species diversity indices of bush layer (0.769-1.451) is much higher than that of herb layer (0.193-0.254), and the diversity in herb layer is strongly influenced by bush layer. 4 The species diversity of desert plant communities shows a gradient of change with respect to longitude, latitude and elevation. For example, rangeland plant Sympegma regelii, with a high level of diversity indices (1.706), is in transition to desert plants Haloxylon ammodendronn community (with a low level of diversity indices of 1.379) in a longitude gradient and to saline Tamarix ramosessima community (with a low level of diversity indices of 0.376) in a latitude gradient. Calligonum mongolicum community, with a low level of species diversity (0.819), is in transition to Ephedra przewalskii (with a low level of diversity indices of 0.890) and Haloxylon ammondendron community (with the diversity indices of 0.645) in an elevational gradient.

群落Shannon-Wiener物種多樣性水平表現(xiàn)為合頭草群落最高(1.706)，具有草原化荒漠植被類型的成分男人天堂网站网址；梭梭群落91精品国产福利下线、膜果麻黃群落居中(0.875~0.890)，荒漠植被類型特征明顯黄片你懂的；沙拐棗群落视频在线黄色一区、胡楊群落、多枝檉柳群落欧美日韩A片免费网站、脹果甘草群落較低(0.079~0.495)毛片一级一区二区三区四区91，荒漠林、鹽地沙生灌叢及鹽化草甸植被均有零星分布26uuuu综合。3荒漠植物群落結(jié)構(gòu)層次中9AV在线观看视频，灌木層占居主導(dǎo)地位，群落灌木層物種多樣性水平(0.769~1.451)遠(yuǎn)遠(yuǎn)大于草本層(0.193~0.254)求国产精品网址，且草本層物種多樣性受灌木層影響較大亚洲一级性交大片。4荒漠植物群落物種多樣性分布格局表現(xiàn)為經(jīng)向、緯向和海拔梯度的變化亚洲一区亚洲二区，經(jīng)向日韩偷窥自拍系列视频在线、緯向變化為物種多樣性水平較高的草原化植物合頭草群落(1.076)向物種多樣性水平較低的荒漠植物梭梭群落(1.379)和鹽化植物多枝檉柳群落(0.376)的過渡多人作爱一级黄片，海拔梯度則呈現(xiàn)低水平的沙拐棗群落(0.819)到高水平的膜果麻黃群落(0.890)向低水平的梭梭群落(0.645)變化。

With the deflected succession of aquatic ecotype plant functional group,the dominance of mesophytes and xerophytes increased,while the dominance of aquatic and hygric plants decreased. However,there are only planting crops in the reclaimed wetland. In the composition of plant biotype functional group,the hydrophytes reduced quickly with the deflected succession and the dominance of perennial herbs is mostly marked,and there are only annual herbs in reclaimed wetland. Compared with primary swamp,the species diversity index of meadow is the highest,the swampy meadow follows,and the reclaimed wetland is the lowest.

植物的水分生態(tài)型功能群組成隨濕地的逆行演替色哟哟哟，水生在线观看很黄很水的视频网站、濕生類植物功能群的優(yōu)勢度不斷減少，中生欧美一级做一级A、旱生類植物功能群的優(yōu)勢度逐步增加姐姐直播App，而在墾后濕地只有農(nóng)作物；植物生活型功能群組成隨濕地的逆行演替日韩最新无码资源站AV，水生草本迅速減少羞羞漫画官方网站在线观看，陸生多年生草本增加占據(jù)優(yōu)勢，而在墾后濕地均為一年生草本免费一看一毛片；濕地植物物種豐富度极品欧美、多樣性指數(shù)由原生沼澤、沼澤化草甸到草甸依次增加1024你懂的金沙人妻片，草甸為最大值欧美福利1区，而墾后濕地則最低。

This results indicated that peashrub shrubland created a favorable N condition for its invading the meadow and being invaded by birch forest, and played a important role in altering the successional direction of meadow→peashrub shrub land →birch forest.

盡管箭葉錦雞兒灌叢植物葉片與凋落物中全N欧美日韩α片在线观看、全P濃度在大多數(shù)取樣點上都低于碩樺人人插人人妻，但表層土中全N濃度高于碩樺和草甸，且其土壤有機質(zhì)的供氮能力以及維持氮素能力都高于碩樺林和草甸欧美男女a视频，表明视频亚洲欧美日韩，錦雞兒灌叢為侵入草甸和碩樺入侵提供了良好的養(yǎng)分條件，在該演替序列的發(fā)展過程中起了一定的推動作用www.青草草。

This paper concerns the analyses of niche breadths of and overlaps bet-ween several plant species in 3 Kobresia communities in the Haibei Research Station using the formula described by Levins and Pianka.

本文利用Levins和Pianka公式九九九九人妻一区精品色，在多維生態(tài)因子梯度上測定了海北地區(qū)高寒草甸三種嵩草群落中若干植物種的生態(tài)位寬度和生態(tài)位重疊。

Ferula：阿魏屬

例生長有大看麥娘(Alopecurus pratensis)的森林草原草甸,生長有雜類草的溝葉羊茅(Festuca sulcata)草甸,由阿魏屬(Ferula)構(gòu)成的短命植物草甸等. 由旱中生大雜類草構(gòu)成的旱化草甸群落,草高80cm~120 cm或更高.

alpine meadow：高寒草甸

高寒草甸(Alpine meadow)是指以寒冷中生多年生草本植物為優(yōu)勢而形成的植物群落,主要分布在林線以上色在线视频导航、高山冰雪帶以下的高山帶草地,耐寒的多年生植物形成了一類特殊的植被類型.

mesophytic habitat：中生生境

mesophyte 中生植物 | mesophytic habitat 中生生境 | mesopoion 中生草甸群落