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Registros recuperados: 10
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Estimating of gross primary production in an Amazon-Cerrado transitional forest using MODIS and Landsat imagery Anais da ABC (AABC)
DANELICHEN,VICTOR H.M.; BIUDES,MARCELO S.; VELASQUE,MAÍSA C.S.; MACHADO,NADJA G.; GOMES,RAPHAEL S.R.; VOURLITIS,GEORGE L.; NOGUEIRA,JOSÉ S..
The acceleration of the anthropogenic activity has increased the atmospheric carbon concentration, which causes changes in regional climate. The Gross Primary Production (GPP) is an important variable in the global carbon cycle studies, since it defines the atmospheric carbon extraction rate from terrestrial ecosystems. The objective of this study was to estimate the GPP of the Amazon-Cerrado Transitional Forest by the Vegetation Photosynthesis Model (VPM) using local meteorological data and remote sensing data from MODIS and Landsat 5 TM reflectance from 2005 to 2008. The GPP was estimated using Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) calculated by MODIS and Landsat 5 TM images. The GPP estimates were compared...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon Basin; Cerrado; Carbon cycle; Climate change; Deforestation; Ecosystem function.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401545
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Functional antagonism between nitrogen-fixing leguminous trees and calcicole-drought-tolerant trees in the Cerrado Acta Botanica
Meira-Neto,João Augusto Alves; Tolentino,Gláucia Soares; Silva,Maria Carolina Nunes Alves da; Neri,Andreza Viana; Gastauer,Markus; Magnago,Luiz Fernando Silva; Yuste,Jorge Curiel; Valladares,Fernando.
ABSTRACT The Cerrado is the largest savanna of South America and its physiognomy varies from savanna to woodlands. There are two main types of woodlands in the Cerrado: dystrophic woodlands, dominated by N-fixing leguminous trees (LEG), and mesotrophic woodlands dominated by non-leguminous drought-tolerant trees (DRY), which are calcicoles and sensitive to Al3+. The working hypothesis is that LEG and DRY are functional antagonists in terms of the acidification/alkalization processes involving different forms of inorganic nitrogen and pH, Ca2+ and Al3+ in soil. Tree species basal area and soil properties were used to investigate the antagonism between LEG and DRY using generalized linear models. The results suggest that LEG and DRY are antagonists. The LEG...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum toxicity; Calcicole species; Dry forests; Ecosystem function; Nitrogen fixing; Tropical savanna; Woodlands.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100011
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Functional reorganization of marine fish nurseries under climate warming ArchiMer
Mclean, Matthew J.; Mouillot, David; Goascoz, Nicolas; Schlaich, Ivan; Auber, Arnaud.
While climate change is rapidly impacting marine species and ecosystems worldwide, the effects of climate warming on coastal fish nurseries have received little attention despite nurseries’ fundamental roles in recruitment and population replenishment. Here, we used a 26‐year time series (1987–2012) of fish monitoring in the Bay of Somme, a nursery in the Eastern English Channel (EEC), to examine the impacts of environmental and human drivers on the spatial and temporal dynamics of fish functional structure during a warming phase of the Atlantic Multidecadal Oscillation (AMO). We found that the nursery was initially dominated by fishes with r‐selected life‐history traits such as low trophic level, low age and size at maturity, and small offspring, which...
Tipo: Text Palavras-chave: Atlantic Multidecadal Oscillation; Climate change; Ecosystem function; English Channel; Fisheries; Functional traits; Life history; Recruitment.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00471/58276/60818.pdf
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On the System Properties of the Planetary Boundaries Ecology and Society
Cornell, Sarah; Stockholm Resilience Centre ; sarah.cornell@stockholmresilience.su.se.
Tipo: Peer-Reviewed Response Palavras-chave: Ecosystem function; Planetary boundaries; Systems analysis; Typology.
Ano: 2012
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Regime Shifts and Ecosystem Service Generation in Swedish Coastal Soft Bottom Habitats: When Resilience is Undesirable Ecology and Society
Troell, Max; Beijer Institute; max@beijer.kva.se; Pihl, Leif; ; l.pihl@kmf.gu.se; Kautsky, Nils; ; nils@ecology.su.se.
Ecosystems can undergo regime shifts where they suddenly change from one state into another.  This can have important implications for formulation of management strategies, if system characteristics develop that are undesirable from a human perspective, and that have a high resistance to restoration efforts. This paper identifies some of the ecological and economic consequences of increased abundance of filamentous algae on shallow soft bottoms along the Swedish west coast. It is suggested that a successive increase in the sediment nutrient pool has undermined the resilience of these shallow systems. After the regime shift has occurred, self-generation properties evolve keeping the system locked in a high-density algae state. The structural and...
Tipo: Peer-Reviewed Reports Palavras-chave: Alternate stable states; Shallow soft bottoms; Eutrophication; Filamentous algal mats; Resilience; Ecosystem function; Ecosystem goods and services..
Ano: 2005
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Resilience, Regime Shifts, and Guided Transition under Climate Change: Examining the Practical Difficulties of Managing Continually Changing Systems Ecology and Society
Lin, Brenda B; CSIRO, Climate Adaptation Flagship; brenda.lin@csiro.au; Petersen, Brian; Michigan State University W.K. Kellogg Biological Station; petersenbri@gmail.com.
Managing terrestrial systems has become increasingly difficult under climate change as unidirectional shifts in climate conditions challenge the resilience of ecosystems to maintain their compositional structure and function. Despite the increased attention of resilience management to guide transformational change, questions remain as to how to apply resilience to manage transitions. Rather than pushing systems across thresholds into alternative states, climate change may create a stepwise progression of unknown transitional states that track changing climate conditions. Because of this uncertainty, we must find ways to guide transitioning systems across climate boundaries towards states that are socially and environmentally desirable. We propose to ease...
Tipo: Peer-Reviewed Insight Palavras-chave: Ecosystem function; Ecosystem structure; Resilience management; Species composition; Unidirectional shifts.
Ano: 2013
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Response and Effect Traits of Coral Reef Fish ArchiMer
Hadj-hammou, Jeneen; Mouillot, David; Graham, Nicholas A. J..
The response-and-effect framework is a trait-based approach that seeks to break down the mechanistic links between ecosystem disturbances, species' traits, and ecosystem processes. We apply this framework to a review of the literature on coral reef fish traits, in order to illustrate the research landscape and structure a path forward for the field. Traits were categorized into five broad groupings: behavioral, life history, morphological, diet, and physiological. Overall, there are fewer studies linking effect traits to ecosystem processes (number of papers on herbivory, n = 14; predation, n = 12; bioerosion, n = 2; nutrient cycling, n = 0) than there are linking response traits to disturbances (climate change, n = 26; fishing, n = 20; pollution, n = 4)....
Tipo: Text Palavras-chave: Ecosystem processes; Environmental disturbances; Functional diversity; Coral reef ecology; Ecosystem function; Trait-based ecology; Systematic review.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00688/79975/82919.pdf
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Responses in Arctic marine carbon cycle processes: conceptual scenarios and implications for ecosystem function ArchiMer
Findlay, Helen S.; Gibson, Georgina; Kedra, Monika; Morata, Nathalie; Orchowska, Monika; Pavlov, Alexey K.; Reigstad, Marit; Silyakova, Anna; Tremblay, Jean-eric; Walczowski, Waldemar; Weydmann, Agata; Logvinova, Christie.
The Arctic Ocean is one of the fastest changing oceans, plays an important role in global carbon cycling and yet is a particularly challenging ocean to study. Hence, observations tend to be relatively sparse in both space and time. How the Arctic functions, geophysically, but also ecologically, can have significant consequences for the internal cycling of carbon, and subsequently influence carbon export, atmospheric CO2 uptake and food chain productivity. Here we assess the major carbon pools and associated processes, specifically summarizing the current knowledge of each of these processes in terms of data availability and ranges of rates and values for four geophysical Arctic Ocean domains originally described by Carmack & Wassmann (2006): inflow...
Tipo: Text Palavras-chave: Sea ice; Climate change; Ecosystem function; Carbon cycling.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00617/72889/71907.pdf
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Scale Mismatches in Social-Ecological Systems: Causes, Consequences, and Solutions Ecology and Society
Cumming, Graeme S; University of Florida; graeme@botzoo.uct.ac.za; Cumming, David H. M.; University of Zimbabwe; cumming@icon.co.zw; Redman, Charles L; Arizona State University; charles.redman@asu.edu.
Scale is a concept that transcends disciplinary boundaries. In ecology and geography, scale is usually defined in terms of spatial and temporal dimensions. Sociological scale also incorporates space and time, but adds ideas about representation and organization. Although spatial and temporal location determine the context for social and ecological dynamics, social-ecological interactions can create dynamic feedback loops in which humans both influence and are influenced by ecosystem processes. We hypothesize that many of the problems encountered by societies in managing natural resources arise because of a mismatch between the scale of management and the scale(s) of the ecological processes being managed. We use examples from southern Africa and the...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Scale; Scale mismatch; Conservation; Management; Ecosystem function; Sociological scale; Southern Africa.
Ano: 2006
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Urban Landscapes and Sustainable Cities Ecology and Society
Andersson, Erik; Stockholm University; erik.andersson@ecology.su.se.
Ecological research targeting sustainable urban landscapes needs to include findings and methods from many lines of ecological research, such as the link between biodiversity and ecosystem function, the role of humans in ecosystems, landscape connectivity, and resilience. This paper reviews and highlights the importance of these issues for sustainable use of ecosystem services, which is argued to be one aspect of sustainable cities. The paper stresses the need to include social and economic factors when analyzing urban landscapes. Spatially explicit data can be used to assess the roles different green areas have in providing people with ecosystem services, and whether people actually have access to the services. Such data can also be used to assess...
Tipo: Peer-Reviewed article Palavras-chave: Ecosystem function; Landscape scale; Sustainable development; Urban ecology.
Ano: 2006
Registros recuperados: 10
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