內(nèi)蒙古錫林郭勒盟草原區(qū)三種針茅群落動(dòng)態(tài)研究
發(fā)布時(shí)間：2018-07-28 14:46
【摘要】：草地生態(tài)系統(tǒng)是地球上分布較廣的類型之一,內(nèi)蒙古草原是我國(guó)北方的天然生態(tài)屏障,其中錫林郭勒盟草原區(qū)為內(nèi)蒙古草原主要的天然草原之一。本文通過(guò)對(duì)內(nèi)蒙古錫林郭勒盟草原區(qū)三種針茅群落,包括克氏針茅(Stipa krylovii)群落、大針茅(Stipa grandis)群落和貝加爾針茅(Stipa Baicalensis)群落2009-2013年連續(xù)5年的監(jiān)測(cè)分析,得到以下結(jié)果：1.在克氏針茅群落,一、二年生植物對(duì)夏季降水較敏感,在豐水年份,會(huì)對(duì)叢生禾草的生長(zhǎng)產(chǎn)生部分抑制作用。對(duì)于大針茅群落和貝加爾針茅群落沒(méi)有這樣的情況。2.5年間,貝加爾針茅群落物種豐富度最大,克氏針茅群落次之,大針茅群落物種豐富度最低；克氏針茅群落Shannon-wienner指數(shù)和Pielou均勻度指數(shù)連續(xù)5年均較平穩(wěn)。大針茅群落除個(gè)別年份外Shannon-wienner指數(shù),Simpson指數(shù)和Pielou指數(shù)均較低。貝加爾針茅群落Shannon-wienner指數(shù),Simpson指數(shù)和Pielou指數(shù)2013年均下降明顯。3.影響三種針茅群落Pielou均勻度指數(shù)的主要植物種是羊草,無(wú)論是羊草的相對(duì)密度還是相對(duì)生物量,與Pielou均勻度指數(shù)均有負(fù)相關(guān)關(guān)系,與克氏針茅群落和貝加爾針茅群落極顯著負(fù)相關(guān)(p0.01),與大針茅群落顯著負(fù)相關(guān)(p0.05)。4.克氏針茅群落地上生物量與年降水量極顯著正相關(guān)(p0.01),與年均溫極顯著負(fù)相關(guān)(p0.01)；大針茅群落和貝加爾針茅群落的相關(guān)關(guān)系不顯著(p0.1)。5.2009-2012年三種針茅群落地上生物量均與Shannon-Wiener指數(shù)極顯著正相關(guān)(p0.01)。6.克氏針茅群落物種豐富度與年降水量顯著正相關(guān)(p0.05),與年均溫極顯著負(fù)相關(guān)(p0.01)；大針茅群落物種豐富度與年降水量和年均溫均達(dá)不到顯著相關(guān)關(guān)系(p0.1)；貝加爾針茅群落物種豐富度與年降水量顯著正相關(guān)(p0.05),與年均溫極顯著負(fù)相關(guān)(p0.01)。
[Abstract]:Grassland ecosystem is one of the most widely distributed types on the earth. Inner Mongolia steppe is the natural ecological barrier in the north of China, and the Xilingol League grassland is one of the main natural steppes in Inner Mongolia grassland. In this paper, through monitoring and analysis of three Stipa species communities in Xilingol League, Inner Mongolia, including (Stipa krylovii) community, (Stipa grandis) community and (Stipa Baicalensis) community in 2009-2013, the following results were obtained: 1: 1. In Stipa krjabini community, first, biennial plants are more sensitive to summer precipitation, and in high water years, they can partly inhibit the growth of herbaceous grasses. There was no such situation for Stipa grandis community and Stipa bajalensis community. During the period of 2.5, the species richness of Stipa bicarboides community was the largest, followed by Stipa krjabini community, and the species richness of Stipa grandis community was the lowest. The Shannon-wienner index and Pielou evenness index of Stipa kristii community were stable for 5 consecutive years. The Shannon-wienner index and Pielou index of Stipa grandis community were lower except in some years. The Shannon-wienner index and Pielou index of Stipa baicalensis community decreased significantly in 2013. The main plant species affecting the Pielou evenness index of three Stipa species was Leymus chinensis. The relative density and biomass of Leymus chinensis were negatively correlated with the Pielou evenness index. There was a significant negative correlation with Stipa krjabini community and Stipa bicarboides community (p0.01), and significant negative correlation with Stipa krjabini community (p0.05) .4. The aboveground biomass of Stipa krjabini community was significantly positively correlated with annual precipitation (p0.01) and negatively correlated with annual mean temperature (p0.01). The correlation between Stipa grandis community and Stipa bajalensis community was not significant (p 0.1). 5. The aboveground biomass of the three species of Stipa arundinacea community was significantly and positively correlated with the Shannon-Wiener index (p0.01) .6 from 2009 to 2012. Species richness was positively correlated with annual precipitation (p0.05), negatively correlated with annual mean temperature (p0.01), and had no significant correlation with annual precipitation and annual mean temperature (p0.1). The species richness of Stipa baicalensis community was positively correlated with annual precipitation (p0.05) and negatively correlated with annual mean temperature (p0.01).
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S812
[Abstract]:Grassland ecosystem is one of the most widely distributed types on the earth. Inner Mongolia steppe is the natural ecological barrier in the north of China, and the Xilingol League grassland is one of the main natural steppes in Inner Mongolia grassland. In this paper, through monitoring and analysis of three Stipa species communities in Xilingol League, Inner Mongolia, including (Stipa krylovii) community, (Stipa grandis) community and (Stipa Baicalensis) community in 2009-2013, the following results were obtained: 1: 1. In Stipa krjabini community, first, biennial plants are more sensitive to summer precipitation, and in high water years, they can partly inhibit the growth of herbaceous grasses. There was no such situation for Stipa grandis community and Stipa bajalensis community. During the period of 2.5, the species richness of Stipa bicarboides community was the largest, followed by Stipa krjabini community, and the species richness of Stipa grandis community was the lowest. The Shannon-wienner index and Pielou evenness index of Stipa kristii community were stable for 5 consecutive years. The Shannon-wienner index and Pielou index of Stipa grandis community were lower except in some years. The Shannon-wienner index and Pielou index of Stipa baicalensis community decreased significantly in 2013. The main plant species affecting the Pielou evenness index of three Stipa species was Leymus chinensis. The relative density and biomass of Leymus chinensis were negatively correlated with the Pielou evenness index. There was a significant negative correlation with Stipa krjabini community and Stipa bicarboides community (p0.01), and significant negative correlation with Stipa krjabini community (p0.05) .4. The aboveground biomass of Stipa krjabini community was significantly positively correlated with annual precipitation (p0.01) and negatively correlated with annual mean temperature (p0.01). The correlation between Stipa grandis community and Stipa bajalensis community was not significant (p 0.1). 5. The aboveground biomass of the three species of Stipa arundinacea community was significantly and positively correlated with the Shannon-Wiener index (p0.01) .6 from 2009 to 2012. Species richness was positively correlated with annual precipitation (p0.05), negatively correlated with annual mean temperature (p0.01), and had no significant correlation with annual precipitation and annual mean temperature (p0.1). The species richness of Stipa baicalensis community was positively correlated with annual precipitation (p0.05) and negatively correlated with annual mean temperature (p0.01).
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S812
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相關(guān)期刊論文 前8條
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