8 Works

Data from: Playing it safe? behavioural responses of mosquito larvae encountering a fish predator

Karthikeyan Chandrasegaran, Avehi Singh, Moumita Laha & Suhel Quader
Predation is a strong selective force that affects prey population and ecosystem dynamics. Detecting predators and associated levels of threat is crucial to prey responses. Once a predator is detected, anti-predatory responses improve the chances of survival of prey. We used Aedes aegypti larvae to study behavioural responses to predation threat from guppies (Poecilia reticulata). Specifically, we tested the relative importance of chemical cues, both in isolation and in combination with physical cues, in eliciting...

Data from: Plant-disperser mutualisms in a semi-arid habitat invaded by Lantana camara L.

Geetha Ramaswami, P. Somnath & Suhel Quader
Dispersal is an important ecological process that affects plant population structure and community composition. Invasive plants with fleshy fruits rapidly form associations with native and invasive dispersers, and may affect existing native plant-disperser associations. We asked whether frugivore visitation rate and fruit removal was associated with plant characteristics in a community of fleshy-fruited plants and whether an invasive plant receives more visitation and greater fruit removal than native plants in a semi-arid habitat of Andhra...

Data from: Impact of wild prey availability on livestock predation by snow leopards

Kulbhushansingh R. Suryawanshi, Stephen M. Redpath, Yash Veer Bhatnagar, Uma Ramakrishnan, Vaibhav Chaturvedi, Sophie C. Smout & Charudutt Mishra
An increasing proportion of the world's poor is rearing livestock today, and the global livestock population is growing. Livestock predation by large carnivores and their retaliatory killing is becoming an economic and conservation concern. A common recommendation for carnivore conservation and for reducing predation on livestock is to increase wild prey populations based on the assumption that the carnivores will consume this alternative food. Livestock predation, however, could either reduce or intensify with increases in...

Data from: Alternative reproductive tactics and inverse size-assortment in a high-density fish spawning aggregation

Rucha Karkarey, Amod Zambre, Kavita Isvaran & Rohan Arthur
Background: At high densities, terrestrial and marine species often employ alternate reproductive tactics (ARTs) to maximize reproductive benefits. We describe ARTs in a high-density and unfished spawning aggregation of the squaretail grouper (Plectropomus areolatus) in Lakshadweep, India. Results: As previously reported for this species, territorial males engage in pair-courtship, which is associated with a pair-spawning tactic. Here, we document a previously unreported school-courtship tactic; where territorial males court multiple females in mid-water schools, which appears...

Data from: Immanent conditions determine imminent collapses: nutrient regimes define the resilience of macroalgal communities

Jordi Boada, Rohan Arthur, David Alonso, Jordi F. Pagès, Albert Pessarrodona, Silvia Oliva, Giulia Ceccherelli, Luigi Piazzi, Javier Romero & Teresa Alcoverro
Predicting where state-changing thresholds lie can be inherently complex in ecosystems characterized by nonlinear dynamics. Unpacking the mechanisms underlying these transitions can help considerably reduce this unpredictability. We used empirical observations, field and laboratory experiments, and mathematical models to examine how differences in nutrient regimes mediate the capacity of macrophyte communities to sustain sea urchin grazing. In relatively nutrient-rich conditions, macrophyte systems were more resilient to grazing, shifting to barrens beyond 1 800 g m−2...

Data from: Successional status, seed dispersal mode and overstorey species influence tree regeneration in tropical rain-forest fragments in Western Ghats, India

Anand M. Osuri, Dayani Chakravarthy, Divya Mudappa, T. R. Shankar Raman, N. Ayyappan, S. Muthuramkumar & N. Parthasarathy
The effects of fragmentation and overstorey tree diversity on tree regeneration were assessed in tropical rain forests of the Western Ghats, India. Ninety plots were sampled for saplings (1–5 cm diameter at breast height (dbh); 5×5-m plots) and overstorey trees (>9.55 cm dbh; 20×20-m plots) within two fragments (32 ha and 18 ha) and two continuous forests. We tested the hypotheses that fragmentation and expected seed-dispersal declines (1) reduce sapling densities and species richness of...

Data from: Responses of interspecific associations in mixed-species bird flocks to selective logging

Binod Borah, Suhel Quader & Umesh Srinivasan
1. Non-trophic interactions (or, inter-species associations) play a prominent role in determining community structure and function. Mixed-species bird flocks are networks of non-trophic associations that confer foraging and anti-predator benefits to participant species. Yet, the responses of these interspecific associations to anthropogenic environmental change are poorly understood. 2. Selective logging is pervasive in the tropics, and can affect associations in mixed-species bird flocks by altering resource availability and/or predation risk, or through the altered abundances...

Data from: Generation and maintenance of predation hotspots of a functionally important herbivore in a patchy habitat mosaic

Simone Farina, Aitana Oltra, Jordi Boada, Frederic Bartumeus, Javier Romero & Teresa Alcoverro
1. By modifying how critical ecosystem functions are distributed across the landscape, the spatial configuration and characteristics of patches can play a strong role in structuring communities. In strongly predator-controlled ecosystems, this patchy distribution of function can have complex downstream consequences, subjecting some areas to disproportionately high rates of predation, leaving other areas susceptible to herbivore outbreaks. 2. In this study we assess how spatial attributes at patch and landscape scales potentially influence the spatial...

Registration Year

  • 2017
    8

Resource Types

  • Dataset
    8

Affiliations

  • Nature Conservation Foundation
    8
  • Tata Institute of Fundamental Research
    3
  • University of Barcelona
    2
  • Spanish National Research Council
    2
  • Bangor University
    1
  • Princeton University
    1
  • University of Aberdeen
    1
  • Pondicherry University
    1
  • University of Sassari
    1
  • University of St Andrews
    1