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| Registros recuperados: 275 | |
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| Crowe, Bronwyn; White, Benedict. |
| Conservation and restoration of native vegetation is often a gradual process which may require many years to transform an ecosystem from one vegetative state to a target ecosystem. This process is stochastic, with some changes potentially irreversible. In contrast, contracts with landholders to undertake conservation measures on their property are typically for less than ten years and often make no contingencies for re-contracting at the end of the contract period. The risk to land holders and conservation agencies of contracts not being renewed and the consequent potential loss of previous investment means including covenants in conservation contracts may be attractive to both parties. A model is developed to empirically examine the optimal dynamic... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: POMDP; Biodiversity; Contracts; Monitoring; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/9457 |
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| Trenkel, Verena; Berger, Laurent. |
| Fisheries acoustic instruments provide information on four major groups in aquatic ecosystems: fish with and without swim bladder (tertiary and quaternary consumers), fluidlike zooplankton (secondary consumers) and small gas bearing organisms such as larval fish and phytoplankton (predominantly primary producers). We entertain that this information is useable to describe the spatial structure of organism groups in pelagic ecosystems. The proposal we make is based on a multi-frequency indicator that synthesises in a single metric the shape of the acoustic frequency response of different organism groups, i.e. the dependence of received acoustic backscattered energy on emitting echosounder frequency. We demonstrate the development and interpretation of the... |
| Tipo: Text |
Palavras-chave: Acoustics; Frequency response curve; Monitoring; EOF; Ecosystem state. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00128/23886/21848.pdf |
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| Petitgas, Pierre; Poulard, Jean-charles. |
| Quantitative analysis of the spatial patterns in age-structured fish populations provides a useful complement to stock assessment methods. The spatial distribution of an age-structured population is characterized by indicators for location, dispersion and aggregation, which are estimated from survey data. The times series of spatial indicators are organised in a 3D data structure with dimensions along indicators, age classes and years. Multi factor analysis (MFA) is applied to quantify the reproducibility in time of the multivariate structure between age classes and indicators. MFA computes the mean annual pattern over the age classes. The deviation around that pattern in each year is also quantified. A multivariate indicator that characterise the spatial... |
| Tipo: Text |
Palavras-chave: Spatial distribution; Monitoring; CUSUM; Multi factor analysis. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6688.pdf |
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| Sommerville, Matthew M.; Department of Life Sciences, Imperial College London; m.sommerville06@imperial.ac.uk; Jones, Julia P. G.; School of Environment and Natural Resources, University of Bangor; julia.jones@bangor.ac.uk; Milner-Gulland, E. J.; Department of Life Sciences, Imperial College London; e.j.milner-gulland@imperial.ac.uk. |
| Over the past decade, “Payments for Environmental Services” (PES) have received a great deal of attention as a natural-resource management approach. We propose a revised definition and framework for PES implementation that focuses on the use of positive incentives as the philosophy behind PES and conditionality as the method for influencing behaviors. We note the importance of additionality of PES interventions to justify their value in a wider context. Finally, we highlight the need to understand the local institutional context in terms of the characteristics of buyers, sellers, and their relationship for implementation to be effective. Our framework acts as a platform to begin examining how the variety of options for structuring PES... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Additionality; Conditional; Ecosystem services; Environmental management; Incentives; Institutions; Monitoring; Transactions. |
| Ano: 2009 |
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| Rufino, Marta; Bez, Nicolas; Brind'Amour, Anik. |
| Spatial indicators are widely used to monitor species and are essential to management and conservation. In the present study, we tested the ability of 11 spatial indicators to quantify changes in species’ geographic patterns: (1) spatial displacement of a patch of biomass (‘shift’), (2) a spatial decrease in a patch, accompanied either by a loss of biomass (‘shrink0’) or (3) a relocation of the same biomass (‘shrink1’), and (4) splitting of a patch into smaller patches (‘split’). The geographic changes were simulated by manipulating the spatial distributions of the demersal species (observed during bottom trawl surveys). Hence, the spatial distributions of the latter being used as input data on which the manipulations were done. Additionally, other aspects... |
| Tipo: Text |
Palavras-chave: Spatial metrics; Monitoring; Marine conservation; Fisheries management. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00625/73684/73148.pdf |
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| Forget, Joelle; Beliaeff, Benoit; Bocquene, Gilles. |
| From April 1997 to June 1998, 14 measurements of acetylcholinesterase (AChE) enzymatic activity were performed with the copepod, Tigriopus brevicornis, collected at five stations in the Vilaine River estuary (South Brittany, France). Simultaneously, four chemical analyses of triazines and one analysis of total pesticides in water were undertaken. AChE activity levels in T brevicornis were compared to the levels measured at a reference site not exposed to effluents from Vilaine River. Results reveal significant differences between AChE activity levels depending on location of stations in the plume of the river with an increasing gradient of activity from the upstream to the downstream stations, thus indicating that neurotoxic contaminants are mainly brought... |
| Tipo: Text |
Palavras-chave: Monitoring; Estuary; Pollution; Pesticides; Tigriopus brevicornis; Acetylcholinesterase activity. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-737.pdf |
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| Tsangaris, Catherine; Hatzianestis, Ioannis; Catsiki, Vassiliki-angelique; Kormas, Konstantinos Ar; Strogyloudi, Evangelia; Neofitou, Christos; Andral, Bruno; Galgani, Francois. |
| An integrated approach using biomarkers and contaminant levels in mussels Mytilus galloprovincialis L was employed to assess chemical contamination in Greek coastal waters within the framework of the MYTIMED program. Biomarkers (metallothioneins, glutathione S-transferase, catalase, acetylcholinesterase and RNA:DNA ratio) have been previously described in mussels caged at 14 sites in coastal areas influenced by different types of anthropogenic activities. This study applied a biomarker index, the Integrated Biomarker Response (IBR) to summarize biomarker responses and relate stress levels to concentrations of organochlorine compounds (PCBs, DDTs), polycyclic aromatic hydrocarbons (PAHs), and metals (Cu, Ni, Fe, Zn) measured in the mussel tissues. The IBR... |
| Tipo: Text |
Palavras-chave: Pollution; Biomarkers; Monitoring; Mussel caging; Mytilus galloprovincialis; Mediterranean Sea. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00059/17033/14718.pdf |
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| Lankoski, Jussi E.; Lichtenberg, Erik; Ollikainen, Markku. |
| Heterogeneity of agricultural landscapes may necessitate the use of spatially targeted instrument combinations to implement the social optimum. But compliance with these policies may require costly enforcement. This paper examines the design of agri-environmental policies featuring two of the most commonly used instruments, reductions in fertilizer application rates and installation of riparian buffers. While compliance with buffer strip requirements is verifiable at negligible cost, fertilizer application is only verifiable through costly monitoring. We derive optimal subsidies for fertilizer reduction and buffer strip set-asides and enforcement strategies for the cases of low and excessive monitoring costs. An empirical simulation model suggests that... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Nutrient runoff; Monitoring; Enforcement; Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/44381 |
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| Barros-Parada,Wilson; Knight,Alan L; Basoalto,Esteban; Fuentes-Contreras,Eduardo. |
| W. Barros-Parada, A.L. Knight, E. Basoalto, and E. Fuentes-Contreras. 2013. An evaluation of orange and clear traps with pear ester to monitor codling moth (Lepidoptera: Tortricidae) in apple orchards. Cien. Inv. Agr. 40(2):307-315. Studies were conducted to evaluate the use of several trap-lure combinations to improve the monitoring of codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), in apple, Malus domestica Bordk. The treatments involved the use of clear, orange, and white traps baited with one or more of the following attractants: the major sex pheromone component of the codling moth, (E, E)-8,10-dodecadien-1-ol (codlemone, PH); a primary volatile constituent of ripe pear, ethyl (E, Z)-2,4-decadienoate (pear ester, PE); and acetic acid... |
| Tipo: Journal article |
Palavras-chave: Codlemone; Cydia pomonella; Lure; Monitoring; Pear ester; Semiochemical. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200006 |
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| PENTEADO, S. do R. C.; OLIVEIRA, E. B. de; IEDE, E. T.. |
| Devido à grande ameaça que Sirex noctilio (vespa da madeira) representa para o setor florestal brasileiro, é de fundamental importância o monitoramento da praga. Para isto, torna-se necessária a definição de uma técnica de amostragem de danos, que leve em conta a grande extensão dos povoamentos de pinus, os de ataque da praga, a praticiade de aplicação de método e os custos da atividade. Neste trabalho foi desenvolvido um método de amostragem, no qual a amostra não tem tamanho fixo, sendo dimensionada à medida em que a amostragem vai sendo realizada, em função dos resultados obtidos. Através da utilização de uma tabela apropriada, pode-se verificar, rapidamente, a nível de campo, se o número de amostras é suficiente, ou se a amostragem deve continuar sendo... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Monitoramento; Wood wasp; Damage; Espécie exótica.; Praga de planta; Amostragem; Dano; Praga; Sirex Noctilio; Vespa da Madeira.; Pinus; Monitoring; Pests; Sampling.. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/306552 |
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| Galgani, Francois; Brien, Aleke Stoefen-o; Weis, Judith; Ioakeimidis, Christos; Schuyler, Qamar; Makarenko, Iryna; Griffiths, Huw; Bondareff, Joan; Vethaak, Dick; Deidun, Alan; Sobral, Paula; Topouzelis, Konstantinos; Vlahos, Penny; Lana, Fernanda; Hassellov, Martin; Gerigny, Olivia; Arsonina, Bera; Ambulkar, Archis; Azzaro, Maurizio; Bebianno, Maria João. |
| Whilst both plastic production and inputs at sea have increased since the 1950s, several modelling studies predict a further increase in the coming years in these respective quantities. We compiled scientific literature on trends in marine litter, consisting largely of plastic and microplastics in the ocean, understanding that monitoring programs or assessments for these aspects are varied, frequently focusing on limited components of the marine environment in different locations, and covering a wide spectrum of marine litter types, with limited standardization. Here we discuss how trends in the amounts of litter in the marine environment can be compared with the information provided by models. Increasing amounts of plastic are found in some regions,... |
| Tipo: Text |
Palavras-chave: Plastic pollution; Marine litter; Microplastics; Trends; Monitoring. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00677/78927/81297.pdf |
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| Pais,Mara P; Varanda,Elenice M. |
| The use of arthropods for monitoring habitat changes has grown widely in the last decades. In Brazil, however, most of the studies in restored areas have involved only vegetation changes. The present study aimed at investigating recolonization patterns of epigeic arthropods in recently restored sites of semideciduous forests in southeastern Brazil. We compared the community structure of adjoining sites 5, 17, 29 and 36 months old with that at a nearby forest remnant (reference site). We also determined the most abundant species and looked for ecological indicator species of each site age. Arthropods were sampled using pitfall traps, and their assemblages were described and compared with multi- and univariate statistical methods. Species abundance and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Formicidae; Seasonal forest; Monitoring; Ecological indicator. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200009 |
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| Registros recuperados: 275 | |
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