5 Works

The flooded habitat adaptation, niche differentiation and evolution of Myristicaceae trees in the Western Ghats biodiversity hotspot in India

Shivaprakash K N, Jagadish M. Rajanna, Srikanth V Gunaga, Ravikanth Gudasalamani, Vasudeva Ramesh, Uma Shaanker6 Ramanan & Dayanandan Selvadurai
Environmental heterogeneity is considered as one of the main drivers of habitat specialization and niche evolution among tropical plant lineages, and local scale habitat specialization promotes niche differentiation among sister taxa. In this study, we examined the degree to which habitat specialization lead to niche differentiation across the distribution range of a given species using five species of the family Myristicaceae native to Western Ghats, India as an example. In the Western Ghats, Myristicaceae species...

Functional diversity of farmland bees across rural-urban landscapes in a tropical megacity

Gabriel Marcacci, Ingo Grass, Vikas S Rao, Shabarish Kumar S, K.B. Tharini, Vasuki Belavadi, Nils Nölke, Teja Tscharntke & Catrin Westphal
Urbanization is a major threat to biodiversity and food security, as expanding cities, especially in the Global South, increasingly compete with natural and agricultural lands. However, the impact of urban expansion on agricultural biodiversity in tropical regions is overlooked. Here we assessed how urbanization affects the functional response of farmland bees, the most important pollinators for crop production. We sampled bees across three seasons in 36 conventional vegetable-producing farms spread along an urbanization gradient in...

Data from: Forest trees in human modified landscapes: ecological and genetic drivers of recruitment failure in Dysoxylum malabaricum (Meliaceae)

Sascha A. Ismail, Jaboury Ghazoul, Gudasalamani Ravikanth, Cheppudira G. Kushalappa, Ramanan Uma Shaanker & Chris J. Kettle
Tropical agro-forest landscapes are global priority areas for biodiversity conservation. Little is known about the ability of these landscapes to sustain large late successional forest trees upon which much forest biodiversity depends. These landscapes are subject to fragmentation and additional habitat degradation which may limit tree recruitment and thus compromise numerous ecosystem services including carbon storage and timber production. Dysoxylum malabaricum is a large canopy tree species in the Meliaceae, a family including many important...

Data from: Does long distance pollen dispersal preclude inbreeding in tropical trees? Fragmentation genetics of Dysoxylum malabaricum in an agro-forest landscape

Sascha A. Ismail, Jaboury Ghazoul, G. Ravikanth, R. Uma Shaanker, Chris J. Kettle & C. G. Kushalappa
Tropical trees often display long distance pollen dispersal, even in highly fragmented landscapes. Understanding how patterns of spatial isolation influence gene flow and interact with background patterns of fine scale spatial genetic structure are critical for evaluating the genetic consequences of habitat fragmentation. In the endangered tropical timber tree Dysoxylum malabaricum (Meliaceae) we apply eleven microsatellite markers with paternity and parentage analysis to directly estimate contemporary gene flow across a large area (216 km2) in...

Taxonomic and functional homogenization of farmland birds along an urbanization gradient in a tropical megacity

Gabriel Marcacci, Catrin Westphal, Arne Wenzel, Varsha Raj, Nils Nölke, Teja Tscharntke & Ingo Graß
Urbanization is a major driver of land use change and biodiversity decline. While most of the ongoing and future urbanization hot spots are located in the Global South, the impact of urban expansion on agricultural biodiversity and associated functions and services in these regions has widely been neglected. Additionally, most studies assess biodiversity responses at local scale (α-diversity), however, ecosystem functioning is strongly determined by compositional and functional turnover of communities (β-diversity) at regional scales....

Registration Year

  • 2022
  • 2014
  • 2012

Resource Types

  • Dataset


  • University of Agricultural Sciences, Bangalore
  • Ashoka Trust for Research in Ecology and the Environment
  • University of Hohenheim
  • University of Göttingen
  • Swiss Federal Institute of Technology in Zurich
  • Concordia University