Invasive cordgrass (Spartina spp.) in south‐eastern Australia induces island formation,salt marsh development,and carbon storage

Invasive vegetation species can lead to major changes in the geomorphology of coastal systems. Within temperate estuaries in the southern hemisphere, especially Australia and New Zealand, the cordgrass Spartina spp. has become established. These species are highly invasive, and their prolific growth leads to the development of supratidal environments in formerly intertidal and subtidal environments. Here, we quantified the impact of Spartina invasion on the geomorphology and sequestration capacity of carbon in the sediments of Anderson Inlet, Victoria, Australia. Spartina was first introduced to the area in the 1930s to aid in land reclamation and control coastal erosion associated with coastal development. We found that Spartina now dominates the intertidal areas of the Inlet and promotes accretion (18 mm/year) causing the formation of over 108 ha of supratidal islands over the past 100 years. These newly formed islands are calculated to potentially contain over 5.5 million tonnes of CO₂ equivalent carbon. Future management of the inlet and other Spartina‐dominated environments within Australian presents a dilemma for resource managers; on the one hand, Spartina is highly invasive and can outcompete native tidal marshes, thereby warranting its eradication, but on the other hand it is likely more resilient to rising sea levels and has the potential for carbon sequestration. Whether or not the potential advantages outweigh the significant habitat change that is anticipated, any management strategies will likely require additional research into costs and benefits of all ecosystem services provided by Spartina including in relation to nutrient cycling, shoreline stabilisation, and biodiversity as well as in response to the longevity of carbon found within the sediments.     

A critical review of entrepreneurial ecosystems research: towards a future research agenda

The entrepreneurial ecosystem (EE) literature has attracted much attention, especially in policy circles. However, the concept suffers from a number of shortcomings: (1) it lacks a clear analytical framework that makes explicit what is cause and what is effect in an EE; (2) while being a systemic concept, the EE has not yet fully exploited insights from network theory, and it is not always clear in what way the proposed elements are connected in an EE; (3) it remains a challenge what institutions (and at what spatial scale) impact on the structure and performance of EE; (4) studies have often focused on the EE in single regions or clusters, but lack a comparative and multi-scalar perspective and (5) the EE literature tends to provide a static framework taking a snapshot of EE without considering systematically their evolution over time. For each of these shortcomings, we make a number of suggestions to take up in future research on EE.     

The role of women in payment for environmental services programs in Osa,Costa Rica

Costa Rica was the first country in the world to implement a nation-wide payment for environmental services (a.k.a. ‘payment for ecosystem services’), or PES, system in 1996. This research investigates the role of women in PES programs in Costa Rica’s Osa peninsula in response to the current dearth of such gendered research on this topic. Osa, one of the least-developed regions of the country, is still heavily forested and replete with properties under PES contracts which are aimed at forest conservation. Extended, structured interviews of 80 landowners in Osa (40 women and 40 men) culled both quantitative and qualitative information about PES participation, environmental perceptions, and both economic and conservation goals. Salient results were, first, that women see current levels of PES funding as more helpful and useful than do men. Second, women much more often perceive themselves as the sole entity responsible for protecting the environment. Third, women more commonly than men listed ‘helping the environment and animals’ as a personal benefit of their PES participation, while men more commonly focused on financial rewards. Last, according to the study herein, women in PES households currently display less decision-making power than those in non-PES households. This dynamic is analyzed through the lens of patriarchal hierarchies as well as women’s mitigation of those hierarchies through the deployment of ideology and agency. Based on these general findings, the researcher recommends that FONAFIFO, the government agency in charge of PES payments, take specific steps to increase PES funding to female-headed households.     

Collaborative Networks for Effective Ecosystem‐Based Management: A Set of Working Hypotheses

Ecosystem‐based management (EBM) represents a comprehensive approach to better govern the environment that also illustrates the collaborative trend in policy and public administration. The need for stakeholder involvement and collaboration is strongly articulated, yet how and for what purposes collaboration would be effective remains largely untested. We address this gap by developing and evaluating a set of hypotheses specifying how certain patterns of collaborations among actors affect their joint ability to accomplish EBM. Content analyses of management plans drawn from five EBM planning processes in Sweden are combined with analyses of the collaborative networks through which these plans have been developed. Our results indicate that system thinking and the ability to integrate across different management phases are favored by collaborations between different kinds of actors, and by project leaders being centrally located in the networks. We also find that dense substructures of collaboration increase the level of specificity in the plans in regards to explicating constraints on human activities. Having many collaborative ties does however not enhance the overall level of specificity. Our results also show that different network characteristics can give rise to similar EBM outcomes. This observed equifinality suggests there is no single blueprint for well‐performing collaborative networks.     

Engaging Local Knowledge in Biodiversity Research: Experiences from Large Inter- and Transdisciplinary Projects

Abstract

The management of biodiversity represents a research topic that needs to involve not only several (sub-) disciplines from the natural sciences but, in particular, also the social sciences and humanities. Furthermore, over the last couple of years, the need for the integration of other kinds of knowledge (experience based or indigenous knowledge) is increasingly acknowledged. For instance, the incorporation of such knowledge is indispensable for place-based approaches to sustainable land management, which require that the specific ecological and social context is addressed. However, desirable as it may be, such an engagement of the holders of tacit knowledge is not easy to achieve. It demands reconciling well-established scientific procedural standards with the implicit or explicit criteria of relevance that apply in civil society — a process that typically causes severe tensions and comes up against both habitual as well as institutional constraints. The difficulty of managing such tensions is amplified particularly in large integrated projects and represents a major challenge to project management. At the Helmholtz Centre for Environmental Research — UFZ, several integrated research projects have been conducted over the past years in which experience has been gained with these specific challenges. This paper presents some of the lessons learned from large integrated projects, with an emphasis on project design and management structure. At the centre of the present contribution are experiences gained in the coordination and management of LEGATO (LEGATO stands for Land-use intensity and Ecological EnGineering — Assessment Tools for risks and Opportunities in irrigated rice based production systems, see www.legato-project.net), an ongoing, large-scale, inter- and transdisciplinary research project dealing with the management of irrigated rice landscapes in Southeast Asia. In this project, local expertise on traditional production systems is absolutely crucial but needs to be integrated with natural and social science research to identify future-proof land management systems.     

论人地关系的主要特征

本文概括了人地关系的五个主要特征:人地关系的多重性、异时相关性、异地相关性、人的主动性和多重决定性。     

Ecosystem Management Research: Clarifying the Concept of Interdisciplinary Work

Abstract

Ecosystem management (EM) is a process for addressing environmental problems. It draws on research from multiple disciplines in order to ensure long-term maintenance of socio-ecological systems. The present study evaluates the definition of interdisciplinary work among researchers involved in generating data use (EM). The goal is twofold: to generate further discussions in research supporting EM, and to better situate this research in the broader context of interdisciplinary science. Using an online questionnaire, data was collected from 119 researchers. A cluster analysis identified both distinct and shared understandings of the concept. A logistic regression analysis identified the extent to which personal characteristics and researchers’ understandings of interdisciplinary theory determine definitions of interdisciplinary work. Researchers differ on the terminology but share an understanding about what it is: both a ‘way to do research’ and a ‘way of thinking about research’. Differences between researchers suggest a growing interest in developing deeper engagements with theoretical discussions of interdisciplinarity. Results are discussed in the context of the current state of development of research for EM and its contributions to sustainability.     

复合生态系统下城市高质量发展时空演化及驱动因素研究——以黄河流域7大城市群为例

基于复合生态系统理论，构建高质量发展评价体系，考察了2010—2018年黄河流域城市群高质量发展时空演化特征与驱动因素，结果表明：①城市群高质量发展呈“下游领先、中游振兴、上游落后”的空间特征，经济发展水平与社会民生低下是首要制约因素。②高质量发展水平趋于收敛，但区域差异显著，资源环境促进高质量发展趋同。③高质量发展耦合逐年攀升，协调度下降趋势明显，东西非均衡化特征突出。④高质量发展的空间差异性由多因子共同作用，其中科技创新是核心驱动因子。     

Florida's Mystery Wreck

During the summer of 2005 the Florida Bureau of Archaeological Research and the Florida Keys National Marine Sanctuary investigated an unusual shipwreck in 6 m (20 ft) of water off Marathon in the Florida Keys. Known locally as the 'Mystery Wreck' it remained relatively undisturbed for over two decades until State of Florida and Sanctuary archaeologists conducted a research project to learn more about this fascinating early shipwreck. This paper presents a summary of field investigations and a preliminary interpretation of the shipwreck.
© 2006 The Authors