Font Size: a A A

Functional Diversity Research Of Typical Forest Communities In Beijing Mountainous Area

Posted on:2013-04-10Degree:MasterType:Thesis
Country:ChinaCandidate:Y X RenFull Text:PDF
GTID:2230330371475306Subject:Ecology
Abstract/Summary:PDF Full Text Request
Functional diversity has been a hot topic in biodiversity research in recent years. It can address a wide range of important ecological questions and is a concept that links species and ecosystems through mechanisms such as resource use complementarity and facilitation. In this thesis, leaf dry matter content (LDMC), leaf area, specific leaf area (SLA), leaf thickness, leaf length, leaf width, leaf nitrogen content (LNC), leaf phosphorus content (LPC), leaf kalium content (LKC), leaf carbon content (LCC) and leaf chlorophyll content (LCH) were chosen, and researches were done in the typical forest communities in western mountains of Beijing. Aim at exploring the relationship between species diversity and functional diversity, characters of present functional diversity indices. Leaf functional traits were compared on community level to explore which functional traits reflect the differences between communities best. The main results are as follows:1、FAD (functional attribute diversity), MFAD (modified FAD), FD (functional diversity based on dendrograms), FRic (convex hull hyper-volume) were positively correlated with species abundance; FEve (functional evenness) was positively correlated with Shannon-wiener index and species evenness; FDQ (quadratic entropy), FDis (functional dispersion) had positive correlation with species evenness and Simpson index.2、Indices can be divided into three main categories, each of these corresponding to one aspect of functional diversity:functional richness (FAD, FD, FRic), functional evenness (FEve) and functional divergence (FDQ, FDis). Every index reflected the verbal definition of its properties, and different aspects of functional diversity are independent from each other.3、Species abundance, FAD, MFAD, FD, FRic had significant differences between artificial coniferous forests and natural broad-leaved forests while FEve, FDQ, FDis had significant differences among different forest types. This indicates that species variance lead to disparities between artificial coniferous forests and natural broad-leaved forests, while differences among forest types result from differences of dominant species.4、Communities with high photosynthetic and production rate tend to have a high functional abundance while functional divergence is more likely affected by morphological characteristics and biomass.5、LDMC, SLA, LA, LKC, LCC, LCH had significant differences among communities, and therefore reflect variance among communities best.
Keywords/Search Tags:Functional diversity, functional trait, functional abundance, functionalevenness, functional divergence
PDF Full Text Request
Related items