Changes in species composition, diversity and biomass of herbaceous plant traits due to N amendment in a dry tropical environment of India

Verma, Praveen Kumar; Sagar, R.; Verma, Hariom; Verma, Preeti; Singh, Dharmendra Kumar

doi:10.1093/jpe/rtu018

Cited by 21 publications

(39 citation statements)

References 54 publications

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“…The climate of the study area is tropical monsoonal with three seasons: winter (November to February), summer (April to June), and rainy (July to September). October and March are transitional months between rainy and winter and winter and summer seasons, respectively (Verma et al 2014). During the study period, mean maximum temperature was 30.51°C while mean minimum temperature was 20.43°C and the mean annual rainfall was 969 mm.…”

Section: Study Locationmentioning

confidence: 97%

“…Convincingly, 60 kg N input might be an optimum dose for maximum D in the tropical grassland because beyond this dose, an extra N constrained the coexistence of other species, and virtually reduced the D (Pausas and Austin 2001). It has been observed that plant species need limited N, and any perturbation in the soil N is likely to cause rare plant species to disappear, but it may favor nitrophilous species to dominate (Lilleskov et al 280 290 300 310 280 290 300 310 280 290 300 310 280 290 300 310 300 310 320 330 340 300 310 320 330 340 300 310 320 330 340 300 310 320 330 340 330 340 350 360 370 330 340 350 360 370 330 340 350 360 370 330 340 350 360 370 380 400 420 440 380 400 420 440 380 400 420 440 380 400 420 440 350 360 370 380 390 350 360 370 380 390 350 360 370 380 390 350 360 370 380 2001, Verma et al 2014) because N enrichment and reduction in soil pH caused due to the N application are found to curtail the number of rare and leguminous species (Goulding et al 1998).…”

Section: Species Diversitymentioning

confidence: 99%

“…, Verma et al. ), and the differences in the biotic as well as abiotic environmental conditions among the ecosystems (Bai et al. , Hautier et al.…”

Section: Introductionmentioning

confidence: 99%

“…It is largely agreed that it is vital to elucidate the level of N deposition beyond which N deposition generates negative effects on structure and function of ecosystems (Hettelingh et al 2001, Umweltbundesamt 2004, Bobbink et al 2010. Variations that exist in the amount and duration of the N received by the ecosystems (Bai et al 2010, Bobbink et al 2010, van Dobben et al 2013, differential responses of the extant species to the deposited N (Stevens et al 2004, Neill 2008, Hautier et al 2009, Bobbink et al 2010, Verma et al 2014, and the differences in the biotic as well as abiotic environmental conditions among the ecosystems (Bai et al 2010, Hautier et al 2014) have been argued as major constraints for arriving at the N dose responsible for the negative effect on the structure and function of an ecosystem (Bai et al 2010, Bobbink et al 2010, Hector et al 2010, van Dobben et al 2013. For example, 10-22 kg NÁha À1 Áyr À1 in the grasslands of the Netherlands (van Dobben et al 2013), 15-30 kg NÁha À1 Áyr À1 in the European grasslands (Bobbink et al 2010), and 17.5 kg NÁha À1 Áyr À1 in the Eurasian grasslands (Bai et al 2010) have been found to cause negative effects on species diversity.…”

Section: Introductionmentioning

confidence: 99%

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Responses of diversity, productivity, and stability to the nitrogen input in a tropical grassland

Verma

Sagar

2019

Ecological Applications

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Atmospheric nitrogen (N) deposition is a matter of serious concern for the structure and functioning of global ecosystems, but the effect of N application of species diversity (D), primary productivity (P), and stability (S) of tropical grassland ecosystems is not known. The present study reports the effects of different levels of N application on species composition, and the D, P, S, and their relationships in a tropical grassland. Within the experimental grassland, 72 1 × 1 m plots with 6 N‐input levels and with 12 replicates, were established in 2013. For 3 yr, different doses of urea as a source of N were applied to the plots. Data on individuals and biomass of each species were recorded and statistically analyzed. The study revealed that the N applied caused variations in species composition, D, P, and S. Below the 90 kg N dose, D was positively related to P and S while, above this level, the relations were negative due to N‐induced responses of species and functional group composition as well as biomass distribution among them. The optimum applied N levels for maximum D (50–60 kg N), P (120 kg N), and a positive relationship of S with D (up to 90 kg N treatment) suggested that the 90‐kg N dose could be the maximum dose of N that the grassland can tolerate. Hence, N application should not exceed the 90‐kg level for sustainability of the structure and functioning of tropical grassland ecosystems.

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Section: Study Locationmentioning

confidence: 97%

Section: Species Diversitymentioning

confidence: 99%

“…, Verma et al. ), and the differences in the biotic as well as abiotic environmental conditions among the ecosystems (Bai et al. , Hautier et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of diversity, productivity, and stability to the nitrogen input in a tropical grassland

Verma

Sagar

2019

Ecological Applications

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“…For example, de Vries et al [50] found that tropical forests had the least response to N deposition compared to temperate and boreal forests, and in some cases a negative growth relationship exists at high N inputs [49]. Herbaceous plants also experience biomass increases from N deposition [48,54], and under low levels of N deposition they can increase aboveground biomass more than trees [51].…”

Section: Observations Of N Impactsmentioning

confidence: 99%

Earth System Model Needs for Including the Interactive Representation of Nitrogen Deposition and Drought Effects on Forested Ecosystems

Drewniak

Gonzàlez-Meler

2017

Forests

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Abstract:One of the biggest uncertainties of climate change is determining the response of vegetation to many co-occurring stressors. In particular, many forests are experiencing increased nitrogen deposition and are expected to suffer in the future from increased drought frequency and intensity. Interactions between drought and nitrogen deposition are antagonistic and non-additive, which makes predictions of vegetation response dependent on multiple factors. The tools we use (Earth system models) to evaluate the impact of climate change on the carbon cycle are ill equipped to capture the physiological feedbacks and dynamic responses of ecosystems to these types of stressors. In this manuscript, we review the observed effects of nitrogen deposition and drought on vegetation as they relate to productivity, particularly focusing on carbon uptake and partitioning. We conclude there are several areas of model development that can improve the predicted carbon uptake under increasing nitrogen deposition and drought. This includes a more flexible framework for carbon and nitrogen partitioning, dynamic carbon allocation, better representation of root form and function, age and succession dynamics, competition, and plant modeling using trait-based approaches. These areas of model development have the potential to improve the forecasting ability and reduce the uncertainty of climate models.

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Role of soil biotic and abiotic properties in plant community composition in response to nitrogen addition

Wang

et al. 2022

Land Degrad Dev

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Nutrient addition can alter plant-soil-microbe interactions. However, knowledge remains limited about how the soil biotic and abiotic properties drive changes in plant community composition and diversity after nitrogen (N) addition. In this study, four N addition rates (N0, N3, N6, and N9: 0, 3, 6, and 9 g N m À2 yr À1 ) were applied to a grassland community on the Loess Plateau (China) to evaluate the response of plant community biomass, evenness, and composition to N addition. Overall, N addition significantly increased plant shoot and root biomass by 27.75%-31.37% and 39.60%-65.42% compared with N0, but no significant difference was observed among N3, N6, and N9. N addition significantly decreased shoot/root biomass ratio by 7.17%-21.84%, and plant community evenness by 3.80%-8.80% compared with N0, particularly under N3 and N6 treatments. Furthermore, N addition enhanced the abundance of bacteria and fungi, but their composition was not altered. Responses of plant biomass and evenness to N addition were correlated to changes in NO 3 À -N, soil total phosphorus, and the abundance of bacteria and fungi; additionally, the composition was primarily affected by the microbial abundance. Our research indicates that N addition can significantly alter plant community composition, particularly at low addition rates, and such alteration may be more affected by the soil microbial abundance. The findings of this study have important implications for the sustainable management of grassland ecosystems.

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Changes in species composition, diversity and biomass of herbaceous plant traits due to N amendment in a dry tropical environment of India

Cited by 21 publications

References 54 publications

Responses of diversity, productivity, and stability to the nitrogen input in a tropical grassland

Responses of diversity, productivity, and stability to the nitrogen input in a tropical grassland

Earth System Model Needs for Including the Interactive Representation of Nitrogen Deposition and Drought Effects on Forested Ecosystems

Role of soil biotic and abiotic properties in plant community composition in response to nitrogen addition

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