| 1. |
- Daniel, Terry C., et al.
(författare)
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Contributions of cultural services to the ecosystem services agenda
- 2012
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 109:23, s. 8812-8819
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Tidskriftsartikel (refereegranskat)abstract
- Cultural ecosystem services (ES) are consistently recognized but not yet adequately defined or integrated within the ES framework. A substantial body of models, methods, and data relevant to cultural services has been developed within the social and behavioral sciences before and outside of the ES approach. A selective review of work in landscape aesthetics, cultural heritage, outdoor recreation, and spiritual significance demonstrates opportunities for operationally defining cultural services in terms of socioecological models, consistent with the larger set of ES. Such models explicitly link ecological structures and functions with cultural values and benefits, facilitating communication between scientists and stakeholders and enabling economic, multicriterion, deliberative evaluation and other methods that can clarify tradeoffs and synergies involving cultural ES. Based on this approach, a common representation is offered that frames cultural services, along with all ES, by the relative contribution of relevant ecological structures and functions and by applicable social evaluation approaches. This perspective provides a foundation for merging ecological and social science epistemologies to define and integrate cultural services better within the broader ES framework.
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| 2. |
- Hahn, Thomas, 1964-, et al.
(författare)
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Insurance value of biodiversity in the Anthropocene is the full resilience value
- 2023
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Ingår i: Ecological Economics. - : Elsevier BV. - 0921-8009 .- 1873-6106. ; 208
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Tidskriftsartikel (refereegranskat)abstract
- Recently two distinctly different conceptualisations of insurance value of biodiversity/ ecosystems have been developed. The ecosystem framing addresses the full resilience value without singling out subjective risk pref-erences. Conversely, the economic framing focuses exactly on this subjective value of risk aversion, implying that the insurance value is zero for risk neutral persons. Here we analyse the differences conceptually and empirically, and relate this to the broader socio-cultural dimensions of social-ecological resilience. The uncertainty of the Anthropocene blurs the distinction between subjective/objective. We show that the economic framing has been operationalised only in specific cases while the broader literature on resilience, disaster risk reduction, and nature-based solutions tend to address the full value of resilience. Yet, the empirical literature that relates to insurance value of biodiversity is hardly consistent with resilience theory because the slow underlying variables defining resilience are rarely addressed. We suggest how the empirical literature on insurance value can be better aligned with resilience theory. Since the ecosystem framing of insurance value captures the essence of the resilience, we propose using the concept resilience value as it may reduce the present ambiguity in terminology and conceptualisation of insurance value of biodiversity.
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| 3. |
- Hahn, Thomas, 1964-, et al.
(författare)
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No net loss of biodiversity, green growth, and the need to address drivers
- 2022
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Ingår i: One Earth. - : Elsevier BV. - 2590-3330 .- 2590-3322. ; 5:6, s. 612-614
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Tidskriftsartikel (refereegranskat)abstract
- Biodiversity offsets and no net loss (NNL) are important tools for the international policy focus on ecological restoration. In this issue of One Earth, Kajula et al. call for national, public offset registers to enable evaluations of biodiversity offset programs. Here, we argue that we also need to control the main drivers of biodiversity loss.
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| 7. |
- Anderson, Pippin, et al.
(författare)
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Post-apartheid ecologies in the City of Cape Town : An examination of plant functional traits in relation to urban gradients
- 2020
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Ingår i: Landscape and Urban Planning. - : Elsevier. - 0169-2046 .- 1872-6062. ; 193, s. 1-10
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Tidskriftsartikel (refereegranskat)abstract
- In this study we explore species richness and traits across two urban gradients in the City of Cape Town. The first is the natural-urban boundary and the second is a socio-economic gradient informed by historical race-based apartheid planning. Plant species and cover were recorded in 156 plots sampled from conservation areas, private gardens, and public open green space. The socio-economic gradient transitioned from wealthier, predominantly white neighbourhoods to poorer, pre- dominantly black neighbourhoods. The socio-economic gradient was selected to fall within one original vegetation type to ensure a consistent biophysical template. There is a marked shift between the natural and urban plant communities in the City of Cape Town, with little structural affinity. Urban landscapes are dominated by grass, with low diversity compared to natural counterparts. A significant ecological gradient of reduced biodiversity, traits, and in turn functionality, was found across the socio-economic gradient. Wealthier communities benefit from more private green space, more public green space, and a greater plant diversity. Poorer communities have limited green space on all fronts, and lower plant and trait diversity. Plant communities with limited diversity are less resilient and if exposed to environmental perturbation would lose species, and associated ecosystem services faster than a species rich community. These species-poor plant communities mirror historical apartheid planning that is resistant to change. Based on how biodiversity, functionality, and associated ecosystem services and ecosystem stability are linked, the results of this study suggests how significant environmental injustice persists in the City of Cape Town.
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| 9. |
- Andersson, Erik, 1978-
(författare)
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Managing the Urban Greens : Maintaining ecological functions in human dominated landscapes
- 2007
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- At the core of this thesis lie two realisations: First, like other ecosystems, those in urban landscapes provide humans with a number of ecosystem services, some recognized while others are not. Second, in cities just as in other intensively used social-ecological systems, management is of central importance. This thesis focuses on how we may manage green areas in cities in an ecologically sustainable way, and enjoy functioning ecosystems close to where most people live. The thesis has four specific objectives: 1) analyse methods for describing the urban landscape, 2) analyze methods for managing urban landscapes rather than single patches of urban green areas, 3) explore the effects of management on diversity patterns and its implications for ecological functions, and 4) investigate the motivations behind the use of different management practices.My results show that changes in urbanization were most distinct at a small scale and that the presence of different bird species depended mostly on access to habitat. They also show that groups of small habitat patches can maintain many of the values of larger patches as long as they are sufficiently close for the organism to move between them, and that matrix heterogeneity must be accounted for. To identify such connected patches and assess their ecological importance I have developed two modelling approaches, one to select suitable model organisms and one to analyse spatial configuration. Further, management is shown to create ecological differences even in areas that are superficially similar, and the roots to these differences are ascribed to the knowledge, institutions and sense of place among different groups of managers. Finally, I try to combine these objectives and sketch out how the organisation of management could be changed to overcome scale mismatches and rigidity. There is potential, both for protection and for management, at all scale levels and this potential should be tapped and nurtured to improve our ability to cope with changes.
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| 10. |
- Andersson, Erik, et al.
(författare)
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Patterns and scale relations among urbanization measures in Stockholm, Sweden
- 2009
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Ingår i: Landscape Ecology. - : Springer Science and Business Media LLC. - 0921-2973 .- 1572-9761. ; 24, s. 1331-1339
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Tidskriftsartikel (refereegranskat)abstract
- In this study we measure urbanization based on a diverse set of 21 variables ranging from landscape indices to demographic factors such as income and land ownership using data from Stockholm, Sweden. The primary aims were to test how the variables behaved in relation to each other and if these patterns were consistent across scales. The variables were mostly identified from the literature and limited to the kind of data that was readily accessible. We used GIS to sample the variables and then principal component analyses to search for patterns among them, repeating the sampling and analysis at four different scales (250 × 250, 750 × 750, 1,250 × 1,250 and 1,750 × 1,750, all in meters). At the smallest scale most variables seemed to be roughly structured along two axes, one with landscape indices and one mainly with demographic factors but also impervious surface and coniferous forest. The other land-cover types did not align very well with these two axes. When increasing the scale this pattern was not as obvious, instead the variables separated into several smaller bundles of highly correlated variables. Some pairs or bundles of variables were correlated on all scales and thus interchangeable while other associations changed with scale. This is important to keep in mind when one chooses measures of urbanization, especially if the measures are indices based on several variables. Comparing our results with the findings from other cities, we argue that universal gradients will be difficult to find since city shape and size, as well as available information, differ greatly. We also believe that a multivariate gradient is needed if you wish not only to compare cities but also ask questions about how urbanization influences the ecological character in different parts of a city.
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