Effects of nutrient additions on plant biomass and diversity of the herbaceous-subshrub layer of a Brazilian savanna (Cerrado)

Bustamante, Mercedes M. C.; Brito, Darlan Quinta de; Kozovits, Alessandra Rodrigues; Luedemann, Gustavo; Mello, Thiago de Roure Bandeira de; Pinto, Alexandre de Siqueira; Munhoz, Cássia Beatriz Rodrigues; Takahashi, Frederico Scherr Caldeira

doi:10.1007/s11258-012-0042-4

Cited by 72 publications

(74 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The invasion by alien species (M. minutiflora) resulted in negative impacts on native grass species. Besides changes in aboveground biomass, addition of N and P also led, although to a lesser extent, to changes in the root morphology and biomass, but these responses were modulated by seasonal variation in soil moisture (Bustamante et al, 2012).…”

Section: Impacts Of Nutrient Addition On the Processes Of Nutrient Cymentioning

confidence: 97%

Potential impacts of climate change on biogeochemical functioning of Cerrado ecosystems

et al. 2012

View full text Add to dashboard Cite

The Cerrado Domain comprises one of the most diverse savannas in the world and is undergoing a rapid loss of habitats due to changes in fire regimes and intense conversion of native areas to agriculture. We reviewed data on the biogeochemical functioning of Cerrado ecosystems and evaluated the potential impacts of regional climate changes. Variation in temperature extremes and in total amount of rainfall and altitude throughout the Cerrado determines marked differences in the composition of species. Cerrado ecosystems are controlled by interactions between water and nutrient availability. In general, nutrient cycles (N, P and base cations) are very conservative, while litter, microbial and plant biomass are important stocks. In terms of C cycling, root systems and especially the soil organic matter are the most important stocks. Typical cerrado ecosystems function as C sinks on an annual basis, although they work as source of C to the atmosphere close to the end of the dry season. Fire is an important factor altering stocks and fluxes of C and nutrients. Predicted changes in temperature, amount and distribution of precipitation vary according to Cerrado sub-regions with more marked changes in the northeastern part of the domain. Higher temperatures, decreases in rainfall with increase in length of the dry season could shift net ecosystem exchanges from C sink to source of C and might intensify burning, reducing nutrient stocks. Interactions between the heterogeneity in the composition and abundance of biological communities throughout the Cerrado Domain and current and future changes in land use make it difficult to project the impacts of future climate scenarios at different temporal and spatial scales and new modeling approaches are needed.Keywords: Savanna, nutrient cycling, fire, land use, climate change, carbon. Os impactos potenciais das mudanças climáticas no funcionamento biogeoquímico dos ecossistemas de cerradoResumo O Domínio Cerrado é composto por uma das savanas mais diversas do mundo e está passando por uma rápida perda de habitats devido às mudanças nos regimes de fogo e intensa conversão de áreas nativas para a agricultura. Os dados sobre o funcionamento biogeoquímico do Cerrado foram revisados, avaliando-se os potenciais impactos das mudanças climáticas regionais. As variações na temperatura, na precipitação e altitude ao longo do Cerrado determinam diferenças marcantes na composição das espécies. Os ecossistemas de Cerrado são controlados por interações entre a água e a disponibilidade de nutrientes. Em geral, a ciclagem de nutrientes (N, P e cátions) são muito conservadores, enquanto a serapilheira, a biomassa microbiana e vegetal são importantes compartimentos de estoque. Em termos de ciclagem de C, o sistema radicular e, especialmente, a matéria orgânica do solo são os estoques mais importantes. Em bases anuais, o ecossistema de cerrado típico funciona como sumidouros de C embora o opere como fonte de C para a atmosfera ao final da estação seca. O fogo é um fator importante alterando...

show abstract

Section: Impacts Of Nutrient Addition On the Processes Of Nutrient Cymentioning

confidence: 97%

Potential impacts of climate change on biogeochemical functioning of Cerrado ecosystems

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Understanding the response of native plants to changes in nutrient availability is important to understand the factors controlling their distribution and abundance in landscapes where soil nutrient levels vary greatly, and when subjected to eutrophication, e.g. increased atmospheric nitrogen (N) deposition (Phoenix et al , Bustamante et al ) or phosphorus (P) arriving in run‐off or dust (Lambers et al ). Nutrient availability is one of the main drivers of plant species distributions (John et al , Perry et al ), in part because plants can only germinate, grow and reproduce where they are able to tolerate local environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus‐ and nitrogen‐acquisition strategies in two Bossiaea species (Fabaceae) along retrogressive soil chronosequences in south‐western Australia

Abrahão

Ryan

Laliberté

et al. 2018

Physiologia Plantarum

View full text Add to dashboard Cite

During long-term ecosystem development and its associated decline in soil phosphorus (P) availability, the abundance of mycorrhizal plant species declines at the expense of non-mycorrhizal species with root specialisations for P-acquisition, such as massive exudation of carboxylates. Leaf manganese (Mn) concentration has been suggested as a proxy for such a strategy, Mn concentration being higher in non-mycorrhizal plants that release carboxylates than in mycorrhizal plants. Shifts in nitrogen (N)-acquisition strategies also occur; nodulation in legumes is expected at low N availability, when sufficient P is available. We investigated whether two congeneric legume species (Bossiaea linophylla and Bossiaea eriocarpa) occurring along two long-term chronosequences on the south-western Australian coast and grown in a glasshouse at varying N and P supply exhibited plasticity in nutrient-acquisition strategies. We hypothesised that the shifts in nutrient limitation and nutrient-acquisition strategies at the community level would also be found at the species level. Leaf N: P ratios and the responses to nutrient availability suggested that growth of both species exhibited P-limitation in all treatments, due to the very high leaf [N] of legumes afforded by symbiotic N-fixation. Mycorrhizal colonisation was not greater at higher P supply, and root exudation of carboxylates was not stimulated at low P supply; both were unrelated to leaf [Mn]. However, nodule production declined with increasing N supply. We conclude that intraspecific variation in nutrient-acquisition and use is low in these species, and that the variation at the community level, observed in previous studies, is likely driven by high-species turnover.

show abstract

“…However, nutrient enrichment of the poor substrate of savannas, especially with phosphorus, may be detrimental to some native species that are adapted to soils with low fertility (Lambers et al 2015) and can facilitate the establishment and growth of exotic and invasive species (Barbosa et al 2010;Bustamante et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Growing Periandra mediterranea on post-mining substrate: native Fabaceae with potential for revegetation of degraded rupestrian grasslands in Brazil

et al. 2018

View full text Add to dashboard Cite

Recovery of degraded areas of rupestrian grasslands is hampered mainly by the limited knowledge regarding substrate management and the biology of native species suitable for revegetation of these areas. Th e aim of our study was to examine the establishment and growth of Periandra mediterranea in diff erent textures of lateritic substrate from a mining-degraded area. Th e growth of P. mediterranea was evaluated using fi ne and coarse laterite, both with and without the addition of topsoil. Survival, dry biomass, content of chemical elements and nodulation were evaluated in ten individuals per treatment sixteen months after planting. Although the substrate has low nutrient content, yet high metal concentrations, all plants survived. Plants growing on coarse laterite had 140 % greater biomass than those growing on fi ne laterite. Th e addition of topsoil increased biomass in coarse and fi ne laterite by 46 and 151 %, respectively, and doubled the number of nodulated plants, regardless of grain size. Th e biomass accumulation of P. mediterranea to a dystrophic substrate revealed its potential for use in the revegetation of degraded areas of rupestrian grasslands. Furthermore, the addition of topsoil facilitated the association of P. mediterranea with nitrogen-fi xing bacteria, and increased its growth and capacity to improve substrate fertility.

show abstract

Effects of nutrient additions on plant biomass and diversity of the herbaceous-subshrub layer of a Brazilian savanna (Cerrado)

Cited by 72 publications

References 29 publications

Potential impacts of climate change on biogeochemical functioning of Cerrado ecosystems

Potential impacts of climate change on biogeochemical functioning of Cerrado ecosystems

Phosphorus‐ and nitrogen‐acquisition strategies in two Bossiaea species (Fabaceae) along retrogressive soil chronosequences in south‐western Australia

Growing Periandra mediterranea on post-mining substrate: native Fabaceae with potential for revegetation of degraded rupestrian grasslands in Brazil

Contact Info

Product

Resources

About