Laxmi Goparaju from Vindhyan Ecology and Natural History Foundation (VENHF), in collaboration with Ravi Kant Chaturvedi of the Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, along with Santosh Kumar Pandey and Akhilesh Singh Raghubanshi from Banaras Hindu University, Anshuman Tripathi from National Mineral Development Corporation Limited, Arun Jyoti Nath from Assam University, S. R. Gupta from Kurukshetra University, and J. S. Singh from Banaras Hindu University has authored a research paper titled “Disturbance Mediated Changes in Litter Turnover and Nutrient Use Efficiency Facilitate Vegetation Shifts in Tropical Dry Ecosystems: Insights From a 10-Year Vegetation Management Study” in the international journal Land Degradation & Development. The article can be accessed on the Wiley Online Library platform. We congratulate the authors.
The study examines how long-term disturbances influence ecosystem processes and vegetation dynamics in tropical dry ecosystems. Increasing anthropogenic pressures such as land-use change, biomass extraction, and altered disturbance regimes are significantly affecting nutrient cycling and vegetation structure in these landscapes. Understanding these processes is critical for ecological restoration and sustainable land management. Using a decade-long vegetation management experiment, the study evaluates changes in litter turnover, nutrient use efficiency, and plant community composition under varying disturbance regimes. Field-based observations combined with ecological analysis were used to assess how disturbance impacts ecosystem functioning over time. The findings suggest that disturbances play a crucial role in altering litter decomposition rates and nutrient cycling, which in turn influence vegetation shifts. Changes in nutrient use efficiency were found to facilitate transitions in plant communities, favouring species adapted to disturbed conditions. The study highlights that these ecological responses are not uniform but vary depending on disturbance intensity and environmental context. Importantly, the research underscores the need to integrate disturbance ecology into land management and restoration planning. It suggests that managing disturbance regimes can be a key strategy in maintaining ecosystem resilience and guiding vegetation recovery in degraded tropical dry ecosystems.
The abstract is provided below:
Tropical dry forests and savannas are critical yet understudied ecosystems that regulate global biogeochemical cycles and support biodiversity. However, their functioning is increasingly threatened by anthropogenic disturbances and climate change. Here, we present a decade-long study (2005–2014) examining litterfall dynamics and nutrient cycling across protection gradients (permanently protected [PP], moderately protected [MP], and unprotected [UP] stands) in India's Vindhyan plateau, where forests are transitioning to savannas due to land-use change. Using field measurements, satellite data, and ecological modeling, we quantified how protection status mediates ecosystem processes in these contrasting biomes. We found that protection status overrides biome differences in driving ecosystem function. PP stands maintained 35%–50% higher annual litterfall (6.4 vs. 3.2 Mg ha−1 yr−1) and double the nutrient return rates (2.54 vs. 1.19 Mg ha−1 yr−1) compared to UP stands, facilitated by microclimatic buffering (3°C–5°C cooler soils, 15%–20% higher humidity) and reduced disturbance. Forests exhibited “elastic resilience,” resisting degradation until abrupt collapse under high disturbance, whereas savannas showed “graded resilience,” declining linearly with disturbance intensity. Alarmingly, MP stands displayed limited recovery, suggesting passive protection alone is insufficient for restoration. Disturbances disrupted nutrient cycling, with UP areas showing 20%–25% higher nutrient use efficiency (NUE)—a short-term survival strategy that reduces long-term nutrient availability. Savanna UP sites are projected to lose 30%–40% of litterfall capacity by 2035, risking irreversible degradation. Landsat data revealed a 6.3% decline in forest cover (2002–2014), exacerbating fire-prone feedback loops. Our findings underscore that protection is paramount for maintaining tropical dry ecosystem functions. Forests require fire suppression, while savannas need grazing management. We advocate for landscape-scale conservation integrating protected cores with buffered use zones. This study provides a framework for managing biome-specific resilience in the face of global change, emphasizing urgent, targeted interventions to avert ecosystem collapse.
