Consulta: subjectFacets:"Ecological indicators"
Registros recuperados: 12
Data/hora: 04/06/2024 05:43:45

Human&amp;#8211;Nature Relationship in Mediterranean Streams: Integrating Different Types of Knowledge to Improve Water Management
Provedor de dados: 7
Autores: Clemente, Adelaide; Environmental Biology Centre, Faculty of Sciences, University of Lisbon; maclemente@fc.ul.pt; Nielsen, Kurt Aagaard; Department of Environmental, Social and Spatial Change, University of Roskilde; aagaard@ruc.dk; Branquinho, Cristina; Environmental Biology Centre, Faculty of Sciences, University of Lisbon; cmbranquinho@fc.ul.pt.
The social and ecological systems of Mediterranean streams are intrinsically linked as a result of long human occupation. In this region, these links vary greatly across small distances due to geomorphology, resulting in great diversity across space, which poses particular challenges for understanding and managing these systems. This demands (i) interdisciplinary integration of knowledge that focuses on the social&amp;#8211;ecological interactions, while according due consideration to the whole; and also (ii) transdisciplinary integration, integrating lay and expert knowledge to understand local specificities. To address these needs&amp;#8212;a focus on interactions and local knowledge&amp;#8212;the research presented here studies the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Co-evolution; Ecological indicators; Interdisciplinary; Local knowledge; Natural resource management; Portugal; Social&amp;#8211; Ecological systems; Transdisciplinary.
Ano: 2009

Communicating Ecological Indicators to Decision Makers and the Public
Provedor de dados: 7
Autores: Schiller, Andrew; Clark University; aschille@black.clarku.edu; Hunsaker, Carolyn T; Pacific Southwest Research Station, USDA Forest Service; carolyn.hunsaker/psw_fresno@fs.fed.us; Kane, Michael A; University of Tennessee, Knoxville; mkane1@utk.edu; Wolfe, Amy K; Oak Ridge National Laboratory; ami@ornl.gov; Dale, Virginia H; Oak Ridge National Laboratory; vhd@ornl.gov; Suter, Glenn W; U.S. Environmental Protection Agency, NCEA; suter.glenn@epamail.epa.gov; Russell, Clifford S; Vanderbilt University; cliff.russell@vanderbilt.edu; Pion, Georgine; Vanderbilt University;; Jensen, Molly H; ;; Konar, Victoria C; ;.
Ecological assessments and monitoring programs often rely on indicators to evaluate environmental conditions. Such indicators are frequently developed by scientists, expressed in technical language, and target aspects of the environment that scientists consider useful. Yet setting environmental policy priorities and making environmental decisions requires both effective communication of environmental information to decision makers and consideration of what members of the public value about ecosystems. However, the complexity of ecological issues, and the ways in which they are often communicated, make it difficult for these parties to fully engage such a dialogue. This paper describes our efforts to develop a process for translating the indicators of...
Tipo: Peer-Reviewed Reports
Palavras-chave: Common language; Communication; Decision making; Ecological indicators; Ecological monitoring; Environmental assessments; Environmental values; Public input.
Ano: 2001

Trend analysis of indicators: a comparison of recent changes in the status of marine ecosystems around the world
Provedor de dados: 5
Autores: Blanchard, Julia L.; Coll, Marta; Trenkel, Verena; Vergnon, Remi; Yemane, Dawit; Jouffre, Didier; Link, Jason S.; Shin, Yunne-jai.
Time-series of ecological and exploitation indicators collected from 19 ecosystems were analysed to investigate whether there have been temporal trends in the status of fish communities. Using linear and non-linear statistical methods, trends are reported for six indicators (mean length of fish in the community, mean lifespan, proportion of predatory fish, total biomass of surveyed species, mean trophic level of landings, and inverse fishing pressure), and the redundancy of these indicators across ecosystems is evaluated. The expected direction of change for an ecosystem that is increasingly impacted by fishing is a decline in all indicators. A mixture of negative and positive directions of change is recorded, both within and among all ecosystems...
Tipo: Text
Palavras-chave: Community; Ecological indicators; Ecosystem-based fisheries management; Ecosystem effects of fishing; Natural resource management.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11373/8166.pdf

Relationships among fisheries exploitation, environmental conditions, and ecological indicators across a series of marine ecosystems
Provedor de dados: 5
Autores: Fu, Caihong; Large, Scott; Knight, Ben; Richardson, Anthony J.; Bundy, Alida; Reygondeau, Gabriel; Boldt, Jennifer; Van Der Meeren, Gro I.; Torres, Maria A; Sobrino, Ignacio; Auber, Arnaud; Travers-trolet, Morgane; Piroddi, Chiara; Diallo, Ibrahima; Jouffre, Didier; Mendes, Hugo; Borges, Maria Fatima; Lynam, Christopher P.; Coll, Marta; Shannon, Lynne J.; Shin, Yunne-jai.
Understanding how external pressures impact ecosystem structure and functioning is essential for ecosystem-based approaches to fisheries management. We quantified the relative effects of fisheries exploitation and environmental conditions on ecological indicators derived from two different data sources, fisheries catch data (catch-based) and fisheries independent survey data (survey-based) for 12 marine ecosystems using a partial least squares path modeling approach (PLS-PM). We linked these ecological indicators to the total biomass of the ecosystem. Although the effects of exploitation and environmental conditions differed across the ecosystems, some general results can be drawn from the comparative approach. Interestingly, the PLS-PM analyses showed...
Tipo: Text
Palavras-chave: Ecological indicators; Environmental conditions; Fisheries exploitation; Marine ecosystems; Partial least squares path modeling.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00250/36155/34710.pdf

A box-model of carrying capacity of the Thau lagoon in the context of ecological status regulations and sustainable shellfish cultures
Provedor de dados: 5
Autores: Pete, Romain; Guyondet, Thomas; Bec, Beatrice; Derolez, Valerie; Cesmat, Ludovic; Lagarde, Franck; Pouvreau, Stephane; Fiandrino, Annie; Richard, Marion.
The decrease of microbial and nutrient inputs from the watershed has long dominated lagoon ecosystem management objectives. Phytoplankton biomass and abundance have drastically decreased for more than a decade and Zostera meadow have gradually recovered, expressing lagoon ecosystem restoration such as Thau lagoon. Do the progressive achievement of the good ecological status of the Thau lagoon possibly threatens the shellfish industry in terms of production and oyster quality, by reducing the carrying capacity? To provide answers about the right balance to be achieved between conservation and exploitation, a new numerical tool was developed to help in decision-making. We hereby propose to incorporate a Dynamic Energy Budget type shellfish production model...
Tipo: Text
Palavras-chave: Shellfish farming; Carrying capacity; Stakeholder implication; Nitrogen and phosphorus inputs; Water frame directive; Ecological indicators; Phytoplankton depletion; Coupled biogeochemical-deb model.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00622/73395/75312.pdf

A step toward the definition of ecological indicators of the impact of fishing on the fish assemblage of the Abore reef reserve (New Caledonia)
Provedor de dados: 5
Autores: Amand, Marion; Pelletier, Dominique; Ferrari, Jocelyne; Kulbicki, Michel.
Marine Protected Areas (MPA) are often contemplated as a tool for the sustainable management of exploited resources and ecosystem conservation. This paper proposes an approach to establish a statistical diagnostic of the effects of MPAs on fish assemblages, and define corresponding ecological indicators. This requires choosing relevant variables (abundance, diversity, demographic parameters..) and appropriate statistical methods. The study was based on data from the Abore reef Reserve in New Caledonia. Two sets of methods: 1-inferential linear models (ANOVA, GLM): 2- Partial Least Squares (PLS) methods of regression, were used to test the effects of this MPA. PLS enabled us to test simultaneously within a model, density, species richness, biomass and mean...
Tipo: Text
Palavras-chave: New Caledonia; PLS regression; Ecological indicators; Fishing impact; Coral reef; Fish; Marine Protected Areas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-398.pdf

An end-to-end model to evaluate the sensitivity of ecosystem indicators to track fishing impacts
Provedor de dados: 5
Autores: Halouani, Ghassen; Le Loc'H, François; Shin, Yunne-jai; Velez, Laure; Hattab, Tarek; Romdhane, Mohamed Salah; Ben Rais Lasram, Frida.
In order to assist fisheries managers, ecological indicators are needed to evaluate the effects of fishing activities on marine ecosystems and to improve communication of these effects in both public and scientific contexts. Finding appropriate indicators is challenging given the complexity of marine food webs as well as the ecosystem response to fishing pressure. In this study, an end-to-end model developed in the Gulf of Gabes ecosystem (Tunisia) was used to compare the performance of a set of ecosystem indicators in assessing the impact of fishing. This end-to-end model aimed to represent the ecosystem functioning by coupling two existing sub-models, the multispecies individual-based model OSMOSE, representing the dynamics of exploited species and the...
Tipo: Text
Palavras-chave: Ecological indicators; OSMOSE; Ecosystem model; End-to-end model; Marine ecosystem; Fishing impacts; Fishery; Gulf of Gabes.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00464/57604/60172.pdf

Ecological indicators to capture the effects of fishing on biodiversity and conservation status of marine ecosystems
Provedor de dados: 5
Autores: Coll, M.; Shannon, L. J.; Kleisner, K. M.; Juan-jorda, M. J.; Bundy, A.; Akoglu, A. G.; Banaru, Daniela; Boldt, J. L.; Borges, M. F.; Cook, A.; Diallo, I.; Fu, C.; Fox, C.; Gascuel, D.; Gurney, L. J.; Hattab, T.; Heymans, J. J.; Jouffre, D.; Knight, B. R.; Kucukavsar, S.; Large, S. I.; Lynam, C.; Machias, A.; Marshall, K. N.; Masski, H.; Ojaveer, H.; Piroddi, C.; Tam, J.; Thiao, D.; Thiaw, M.; Torres, M. A.; Travers-trolet, Morgane; Tsagarakis, K.; Tuck, I.; Van Der Meeren, G. I.; Yemane, D.; Zador, S. G.; Shin, Y. -j.
IndiSeas (“Indicators for the Seas”) is a collaborative international working group that was established in 2005 to evaluate the status of exploited marine ecosystems using a suite of indicators in a comparative framework. An initial shortlist of seven ecological indicators was selected to quantify the effects of fishing on the broader ecosystem using several criteria (i.e., ecological meaning, sensitivity to fishing, data availability, management objectives and public awareness). The suite comprised: (i) the inverse coefficient of variation of total biomass of surveyed species, (ii) mean fish length in the surveyed community, (iii) mean maximum life span of surveyed fish species, (iv) proportion of predatory fish in the surveyed community, (v) proportion...
Tipo: Text
Palavras-chave: Ecological indicators; Marine ecosystems; Biodiversity; Redundancy; Trends; States; Fishing impacts; Conservation.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00281/39201/37902.pdf

Effects of Nutrient Management Scenarios on Marine Food Webs: A Pan-European Assessment in Support of the Marine Strategy Framework Directive
Provedor de dados: 5
Autores: Piroddi, Chiara; Akoglu, Ekin; Andonegi, Eider; Bentley, Jacob W.; Celić, Igor; Coll, Marta; Dimarchopoulou, Donna; Friedland, René; De Mutsert, Kim; Girardin, Raphael; Garcia-gorriz, Elisa; Grizzetti, Bruna; Hernvann, P.-y.; Heymans, Johanna J.; Müller-karulis, Bärbel; Libralato, Simone; Lynam, Christopher P.; Macias, Diego; Miladinova, Svetla; Moullec, Fabien; Palialexis, Andreas; Parn, Ove; Serpetti, Natalia; Solidoro, Cosimo; Steenbeek, Jeroen; Stips, Adolf; Tomczak, Maciej T.; Travers-trolet, Morgane; Tsikliras, Athanassios C.
Eutrophication is one of the most important anthropogenic pressures impacting coastal seas. In Europe, several legislations and management measures have been implemented to halt nutrient overloading in marine ecosystems. This study evaluates the impact of freshwater nutrient control measures on higher trophic levels (HTL) in European marine ecosystems following descriptors and criteria as defined by the Marine Strategy Framework Directive (MSFD). We used a novel pan-European marine modeling ensemble of fourteen HTL models, covering almost all the EU seas, under two nutrient management scenarios. Results from our projections suggest that the proposed nutrient reduction measures may not have a significant impact on the structure and function of European...
Tipo: Text
Palavras-chave: Ecological modeling; Hydrological modeling; Hydrodynamic and biogeochemical modeling; Higher trophic level modeling; Ecological indicators; Criteria; Policy support.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79746/82520.pdf

CAP-reform and the provision of non-commodity outputs in Brandenburg
Provedor de dados: 31
Autores: Happe,   Kathrin; Damgaard,   Martin; Osuch,   Amanda; Sattler,   Claudia; Zander,   Peter; Uthes,   Sandra; Schuler,   Johannes; Piorr,   Annette.
This paper presents an attempt to model the response of selected farms to decoupled direct payments and the associated impact on the provision of a defined set of non-commodity outputs (NCO’s) using a combined modelling approach consisting of the AgriPoliS and MODAM models. AgriPoliS focuses on the socio-economic dimension of multifunctionality at the individual farm and regional levels and explicitly models heterogeneous farms (in size, location and efficiency) within a competitive and dynamic environment. The linear-programming model MODAM allows a detailed representation of production processes and their impact on the environmental dimension of multifunctionality at the farm level. We simulate the impact of a uniform area payment and a fully decoupled...
Tipo: Journal Article
Palavras-chave: Decoupling; Multifunctionality; Non-commodity outputs; Modelling; Simulation; Policy analysis; Ecological indicators; Agricultural and Food Policy; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/97193

Habitat Benefit Assessment and Decision-making: A Report to the National Marine Fisheries Service
Provedor de dados: 31
Autores: Boyd,   James; Sanchirico,   James N.; Shabman,   Leonard A.
Habitats and the services they provide are part of our nation's portfolio of natural capital assets. As for many components of this portfolio, it is difficult to assess the value of their services, and this complicates regulators' investment decisions, especially when the alternative use is measurable. The principal objective of this report is to suggest possible strategies for the National Marine Fisheries Service (NMFS) as it applies economic analyses and arguments in support of the agency's trustee responsibilities. Many approaches are possible, and as we discuss, the "right" strategy will depend on the questions asked, the resources available, and the agency's role in the consultation process. We discuss in detail bioeconomic modeling and ecosystem...
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomic; Ecological indicators; Ecosystem services; Resource /Energy Economics and Policy; Q20.
Ano: 2004
URL: http://purl.umn.edu/10904

Changes in microplanktonic protists assemblages promoted by the thermocline induced stratification around an oceanic archipelago
Provedor de dados: 42
Autores: COSTA,ALEJANDRO E.S.F. DA; SANTANA,JANA R. DE; NEUMANN-LEITÃO,SIGRID.
Abstract In the area around the archipelago of São Pedro e São Paulo (ASPSP), a set of small rocky islands in the Equatorial Atlantic, the thermocline begins at a more superficial depth than in the surrounding waters. This raises the question if there is any change in heterotrophic microplanktonic protists assemblages occurring in the surface mixed layer and in the subsurface layer. To answer this question, we sampled seawater in seven depths (between 1-100 m) with a 10L Niskin bottle and obtained temperature and salinity profiles with a CTD at eight sites around the ASPSP. The depth of the surface mixed layer varied between 18-63 meters. Dinoflagellates dominated in terms of abundance representing over 80% and 65% of the individuals found in the surface...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dinoflagellates; Ecological indicators; Polycystine radiolarians; Tintinnid ciliates; Tropical oceans; Vertical distribution.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502249