Leonardo M. Buria
National Scientific and Technical Research Council
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Featured researches published by Leonardo M. Buria.
Ecology Letters | 2011
Luz Boyero; Richard G. Pearson; Mark O. Gessner; Leon A. Barmuta; Verónica Ferreira; Manuel A. S. Graça; David Dudgeon; Andrew J. Boulton; Marcos Callisto; Eric Chauvet; Julie E. Helson; Andreas Bruder; Ricardo Albariño; Catherine M. Yule; Muthukumarasamy Arunachalam; Judy N. Davies; Ricardo Figueroa; Alexander S. Flecker; Alonso Ramírez; Russell G. Death; Tomoya Iwata; Jude M. Mathooko; Catherine Mathuriau; José Francisco Gonçalves; Marcelo S. Moretti; Tajang Jinggut; Sylvain Lamothe; Charles M’Erimba; Lavenia Ratnarajah; Markus Schindler
The decomposition of plant litter is one of the most important ecosystem processes in the biosphere and is particularly sensitive to climate warming. Aquatic ecosystems are well suited to studying warming effects on decomposition because the otherwise confounding influence of moisture is constant. By using a latitudinal temperature gradient in an unprecedented global experiment in streams, we found that climate warming will likely hasten microbial litter decomposition and produce an equivalent decline in detritivore-mediated decomposition rates. As a result, overall decomposition rates should remain unchanged. Nevertheless, the process would be profoundly altered, because the shift in importance from detritivores to microbes in warm climates would likely increase CO(2) production and decrease the generation and sequestration of recalcitrant organic particles. In view of recent estimates showing that inland waters are a significant component of the global carbon cycle, this implies consequences for global biogeochemistry and a possible positive climate feedback.
Ecology | 2011
Luz Boyero; Richard G. Pearson; David Dudgeon; Manuel A. S. Graça; Mark O. Gessner; Ricardo Albariño; Verónica Ferreira; Catherine M. Yule; Andrew J. Boulton; Muthukumarasamy Arunachalam; Marcos Callisto; Eric Chauvet; Alonso Ramírez; Julián Chará; Marcelo S. Moretti; José Francisco Gonçalves; Julie E. Helson; Ana Marcela Chará-Serna; Andrea C. Encalada; Judy N. Davies; Sylvain Lamothe; Aydeé Cornejo; Aggie O. Y. Li; Leonardo M. Buria; Verónica Díaz Villanueva; María del Carmen Zúñiga; Catherine M. Pringle
Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming.
Fundamental and Applied Limnology | 2007
Leonardo M. Buria; Ricardo Albariño; Verónica Díaz Villanueva; Beatriz Modenutti; Esteban Balseiro
: Introduction of salmonids is a common and widespread practice in rivers and lakes of Patagonia, but their impacts remain poorly understood. We analyse the effect of exotic introduced salmonids (rainbow trout Oncorhynchus mykiss) on the benthic macroinvertebrate community of low order streams. We conducted a field survey in three headwater streams (Challhuaco, Cascada and Pescadero streams) in the northern Andean-Patagonian region (around 41 ° S and 1500m above sea level). The streams are canopied by deciduous Nothofagus pumi-lio forest. On each system, we established fishless and contiguous fish sites separated by waterfalls that limit fish access to upper sections. At each site we determined benthic macroinvertebrate size, taxonomic and functional structure in addition to trout gut contents. In the presence of trout, we observed significant shifts in invertebrate body size towards smaller individuals, thus a decrease in total macroinvertebrate biomass was observed. We found that large taxa (Klapopteryx kuscheli, Tipula sp.) and active swimming species (Metamonius anceps and Hyalella curvispina) were reduced in abundance or were absent in reaches with trout. At the same time, we found that trout positively selected large size classes of invertebrates. As a consequence of species losses, benthic community structure changed drastically in the presence of trout : shredders were the feeding group most affected negatively (-68 %) followed by scrapers. The reduction of shredders may suggest a potential effect on Nothofagus leaf litter breakdown and hence, supply of FPOM to downstream reaches.
Global Ecology and Biogeography | 2012
Luz Boyero; Richard G. Pearson; David Dudgeon; Verónica Ferreira; Manuel A. S. Graça; Mark O. Gessner; Andrew J. Boulton; Eric Chauvet; Catherine M. Yule; Ricardo Albariño; Alonso Ramírez; Julie E. Helson; Marcos Callisto; Muthukumarasamy Arunachalam; Julián Chará; Ricardo Figueroa; Jude M. Mathooko; José Francisco Gonçalves; Marcelo S. Moretti; Ana Marcela Chará-Serna; Judy N. Davies; Andrea C. Encalada; Sylvain Lamothe; Leonardo M. Buria; José Castela; Aydeé Cornejo; Aggie O. Y. Li; Charles Mwithali M'Erimba; Verónica Díaz Villanueva; María del Carmen Zúñiga
Hydrobiologia | 2010
Leonardo M. Buria; Ricardo Albariño; Verónica Díaz Villanueva; Beatriz Modenutti; Esteban Balseiro
Ecología austral | 2010
Beatriz Modenutti; Ricardo Albariño; Marcela Bastidas Navarro; Verónica Díaz Villanueva; María Sol Souza; Carolina Trochine; Cecilia Laspoumaderes; Florencia Cuassolo; Gustavo Mariluán; Leonardo M. Buria; Esteban Balseiro
Revista Chilena de Historia Natural | 2009
Leonardo M. Buria; Ricardo Albariño; Beatriz Modenutti; Esteban Balseiro
Annales De Limnologie-international Journal of Limnology | 2010
Verónica Díaz Villanueva; Leonardo M. Buria; Ricardo Albariño
Limnologica | 2011
Ricardo Albariño; Leonardo M. Buria
Global Ecology and Biogeography | 2012
Luz Boyero; Richard G. Pearson; David Dudgeon; Verónica Ferreira; Manuel A. S. Graça; Mark O. Gessner; Andrew J. Boulton; Eric Chauvet; Catherine M. Yule; Ricardo Albariño; Alonso Ramírez; Julie E. Helson; Marcos Callisto; Muthukumarasamy Arunachalam; Julián Chará; Ricardo Figueroa; Jude M. Mathooko; José Francisco Gonçalves; Marcelo S. Moretti; Ana Marcela Chará-Serna; Judy N. Davies; Andrea C. Encalada; Sylvain Lamothe; Leonardo M. Buria; José Castela; Aydeé Cornejo; Aggie O. Y. Li; Charles Mwithali M'Erimba; Verónica Díaz Villanueva; María del Carmen Zúñiga