Biodiversity and Conservation

, Volume 19, Issue 5, pp 1279–1295

Vascular plant species richness on wetland remnants is determined by both area and habitat heterogeneity

  • Jianmin Shi
  • Keming Ma
  • Jifeng Wang
  • Jingzhu Zhao
  • Kate He
Original Paper

DOI: 10.1007/s10531-009-9757-5

Cite this article as:
Shi, J., Ma, K., Wang, J. et al. Biodivers Conserv (2010) 19: 1279. doi:10.1007/s10531-009-9757-5

Abstract

There is an ongoing ecological debate on whether area per se or habitat heterogeneity is the main driver for species richness. The wetland remnants in the Sanjiang Plain, NE China harbor a high biodiversity and play an important role for local ecosystems. Fifty-one wetland remnants were sampled to examine the effect of area and habitat heterogeneity on vascular plant species richness. Number of community types, elevation, water heterogeneity and soil resource heterogeneity were employed as habitat heterogeneity variables, but only water heterogeneity was identified as the proper surrogate for habitat heterogeneity. Compared with the classic species-area model, the choros model achieved better fitness when water heterogeneity and elevation were employed as habitat heterogeneity variables. Nevertheless, elevation was poorly correlated with species richness. It suggests, without a comprehensive analysis of habitat heterogeneity variables, the choros model might result in a misleading result. In this study, species richness was significantly influenced by water heterogeneity, area and number of community types. Water heterogeneity and area both controlled the number of community types, and they were the two main determinants of species richness. As area was significantly and positively correlated with water heterogeneity, the variance in species richness was mainly related to the mutual effect of area and water heterogeneity. The results of this study confirmed that the relationship between the area per se hypothesis and the habitat heterogeneity hypothesis was conjunct rather than mutually exclusive. In addition, it is critical that both area and water heterogeneity should be taken into account for biodiversity conservation and management in wetland remnants.

Keywords

Species-area relationship The choros model Habitat heterogeneity Species richness Wetland remnant The Sanjiang Plain NE China 

Abbreviations

NCT

Number of community types

CV

Coefficient of variation

WC

Water condition

SQI

Soil quality index

EC

Electrical conductivity

OM

Organic matter

TN

Total nitrogen

AN

Available nitrogen

TP

Total phosphorus

AP

Available phosphorus

TK

Total potassium

AK

Available potassium

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Jianmin Shi
    • 1
    • 2
  • Keming Ma
    • 1
    • 3
  • Jifeng Wang
    • 4
  • Jingzhu Zhao
    • 1
  • Kate He
    • 5
  1. 1.Institute of Urban Environment, Chinese Academy of SciencesXiamenChina
  2. 2.College of ForestryJiangxi Agricultural UniversityNanchangChina
  3. 3.State Key Laboratory of Urban and Regional EcologyResearch Center for Eco-Environmental Sciences, Chinese Academy of SciencesBeijingChina
  4. 4.Institute of Natural Resource and Ecology, Heilongjiang Academy of SciencesHarbinChina
  5. 5.Department of Biological SciencesMurray State UniversityMurrayUSA