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排序方式: 共有217条查询结果,搜索用时 15 毫秒
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Theresa M. Marteau Irma Nippert Sue Hall Caroline Limbert Margaret Reid Martin Bobrow Alan Cameron Martina Cornel Mariet van Diem Bernd Eiben Sixto García-Miñaur Janine Goujard Donna Kirwan Karen McIntosh Peter Soothill Corien Verschuuren-Bemelmans Catherine de Vigan Stephen Walkinshaw Lenore Abramsky Frank Louwen Peter Miny Jürgen Horst 《黑龙江环境通报》2002,22(7):562-566
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Both academics and practitioners consider a lack of knowledge about evolutionary theory to be a general barrier to effectively managing genetic diversity. However, it is challenging to judge practitioners’ level of understanding and how this influences their management decisions. Knowledge built through experience may be difficult for practitioners to articulate, but could nonetheless result in appropriate management strategies. To date, researchers have assessed only the explicit (formal) knowledge practitioners have of evolutionary concepts. To explore practitioners’ understanding of evolutionary concepts, it is necessary to consider how they might apply explicit and implicit knowledge to their management decisions. Using an online survey, we asked Australian practitioners to respond to 2 common management scenarios in which there is strong evidence that managing genetic diversity can improve outcomes: managing small, isolated populations and sourcing seeds for restoration projects. In describing their approach to these scenarios, practitioners demonstrated a stronger understanding of the effective management of genetic diversity than the definitions of the relevant concepts. However, their management of genetic diversity within small populations was closer to best practice than for restoration projects. Moreover, the risks practitioners described in implementing best practice management were more likely to affect their approach to restoration than translocation projects. These findings provide evidence that strategies to build the capacity of practitioners to manage genetic diversity should focus on realistic management scenarios. Given that practitioners recognize the importance of adapting their practices and the strong evidence for the benefits of actively managing genetic diversity, there is hope that better engagement by evolutionary biologists with practitioners could facilitate significant shifts toward evolutionarily enlightened management. 相似文献
106.
Gariano Stefano Luigi Petrucci Olga Rianna Guido Santini Monia Guzzetti Fausto 《Regional Environmental Change》2018,18(2):437-449
Regional Environmental Change - Land use and land cover (LULC), as well as their geographical and temporal variations, affect landslide occurrence and the related risk, in ways that are difficult... 相似文献
107.
Coastal development along the Mediterranean coast needs to be tackled with an integrated approach, in order to safeguard people
and properties from extreme events, maintain environmental flows and ecosystems functions, protect coastal landscapes and
ensure public accessibility to the shore. The complexity of the Mediterranean countries legal and administrative framework
and its morphological heterogeneity make the implementation of new the Protocol on ICZM provisions on coastal setbacks,—claiming
for a 100 m wide buffer zone where construction is not allowed— a challenge for the success of the initiative. European countries
and the European Commission are party to the protocol but the European legal framework lacks of specific provisions addressing
the definition of coastal setbacks. Moreover, climate change, in terms of sea level rise and maritime climate, could play
a major role in the future position of setback lines. While arbitrary setbacks should be put in place to halt short-term unwise
coastal development, science can improve the identification of coastal setbacks by providing integrated methodologies to be
implemented at the local level. The objective of this paper is to review concepts and practices in the use of coastal setbacks,
in the context of the provisions of the ICZM protocol and taking into account new challenges posed by climate change. A stepwise
route map is proposed as a base to identify coastal setbacks, applicable to the Mediterranean region and elsewhere, to be
used as a base to improve arbitrary setback approaches. 相似文献
108.
Coastal development along the Mediterranean coast needs to be tackled with an integrated approach, in order to safeguard people
and properties from extreme events, maintain environmental flows and ecosystems functions, protect coastal landscapes and
ensure public accessibility to the shore. The complexity of the Mediterranean countries legal and administrative framework
and its morphological heterogeneity make the implementation of new the Protocol on ICZM provisions on coastal setbacks,—claiming
for a 100 m wide buffer zone where construction is not allowed— a challenge for the success of the initiative. European countries
and the European Commission are party to the protocol but the European legal framework lacks of specific provisions addressing
the definition of coastal setbacks. Moreover, climate change, in terms of sea level rise and maritime climate, could play
a major role in the future position of setback lines. While arbitrary setbacks should be put in place to halt short-term unwise
coastal development, science can improve the identification of coastal setbacks by providing integrated methodologies to be
implemented at the local level. The objective of this paper is to review concepts and practices in the use of coastal setbacks,
in the context of the provisions of the ICZM protocol and taking into account new challenges posed by climate change. A stepwise
route map is proposed as a base to identify coastal setbacks, applicable to the Mediterranean region and elsewhere, to be
used as a base to improve arbitrary setback approaches. 相似文献
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Biosorption of heavy metals is an innovative and alternative technology to remove these pollutants from aqueous solutions using inactive and dead biomasses such as agricultural and industrial wastes, algae and bacteria. In this study olive mill solid residue was used as heavy metal adsorbent material for its wide availability as agricultural waste and also for its cellulosic matrix, rich of potential metal binding active sites. Preliminary studies concerned with the removal of different heavy metals (Hg, Pb, Cu, Zn and Cd), the effect of pre-treatments by water and n-hexane and the regeneration possibility. Olive mill solid residue resulted able to remove heavy metals from aqueous solutions with an affinity series reflecting the hydrolytic properties of the metallic ions, but also a particular affinity for copper. It can be supposed that biosorption phenomenon occur by a general ion exchange mechanism combined with a specific complexation reaction for copper ions. Water pre-treatment is sufficient to reduce COD release in the effluent according to the law limit, while n-hexane pre-treatment strongly reduces also the adsorption properties of this material. Experimental isotherms obtained under different operating conditions were fitted using a non linear regression method for the estimation of the Langmuir parameters. Moreover a simple Scatchard plot analysis was performed for a preliminary investigation of the active sites, showing the presence of two different site affinities depending on the metal concentration, according to the previous hypothesis of two kinds of uptake mechanisms for copper biosorption. Regeneration tests gave good results in terms of yield of regeneration and also concentration ratios. 相似文献