The Knysna Basin, South Africa: geomorphology, landscape sensitivity and sustainability

Marker, Margaret E.

doi:10.1111/1475-4959.04971

Cited by 14 publications

(13 citation statements)

References 13 publications

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“…Rapid population growth attributed to the net in-migration of young, low-skilled job seekers and older, high-income retirees have placed increased pressure on existing infrastructure, and demand for housing (Eden District Municipality, 2009). This urbanisation pressure is set against a backdrop of very limited developable land, a sensitive environment, and a lack of new jobs being created in the local economy (Allanson, 2000;Marker, 2003).…”

Section: Study Site Descriptionmentioning

confidence: 99%

Piloting a social-ecological index for measuring flood resilience: A composite index approach

Kotzee

Reyers

2016

Ecological Indicators

210

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Section: Study Site Descriptionmentioning

confidence: 99%

Piloting a social-ecological index for measuring flood resilience: A composite index approach

Kotzee

Reyers

2016

Ecological Indicators

210

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“…8001 ha -should be protected as sanctuary zone), and in some areas the seagrass beds are heavily impacted by bait collection (Hodgson et al, 2000;Napier et al, 2009;andsee Wynberg andBranch, 1994, 1997). Further, the Garden Route in general and Knysna in particular is one of the top ten tourist attractions in South Africa (Ferreira, 2007;Burger, 2010), with Knysna having the largest recreational value of any temperate South African estuary (Turpie and Clark, 2007), hence its intertidal wetlands are also heavily affected by 'people-pressure' in its many forms (Maree, 2000;Marker, 2003;Knysna Municipality, 2005). Moreover the pace of development around the shoreline has been increasing during the last 20 years despite the involvement of South African National Parks (Russell et al, 2009), the current growth rate of tourist and tourist-related facilities there being described as 'aggressive' (Knysna Municipality, 2009).…”

Section: Introductionmentioning

confidence: 99%

Spatial variation in abundance and diversity of the smaller surface and near‐surface eelgrass‐associated intertidal macrobenthos within a warm‐temperate estuarine bay in the Garden Route National Park, RSA

Barnes

2010

Aquatic Conservation

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ABSTRACT1. Smaller members (o10 mm) of the sediment-surface macrobenthos of Nanozostera capensis meadows across 9 km 2 of the marine Outer Basin of the Knysna estuarine bay (Garden Route National Park, Western Cape, South Africa) were investigated at a series of 24 stations.2. Ordination (nMDS) disclosed the existence of five clusters of stations related to degree of exposure. Relatively sheltered stations were dominated by two endemic species of deposit-feeding microgastropod, and they supported significantly higher macrobenthic densities but lower species diversity and less evenness than relatively exposed stations. The latter were dominated by polychaetes and also possessed more suspension feeders, equivalent to more open seagrass beds in other latitudes. Species richness per station, however, was relatively constant across the whole basin.3. The smaller benthic macrofauna, totalling 82 species, was found to include several animals (o5 mm) hitherto unknown from the region, including one gastropod genus (Cornirostra) not previously known from Africa.4. Species were patchily distributed across all scales from 1 m to 41 km, but variance partitioning showed components of total variance to decrease with increasing spatial scale: sample (46.5%), station (30.0%), site (23.5%).5. These findings are discussed in relation to conservation site selection in rich but faunistically heterogeneous seagrass beds that are impacted by bait collection or other human disturbance.

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“…Further applications include landscape responses to Quaternary climate fluctuations in tropical areas (Thomas 2004) or long-term talus studies with regard to the sensitivity of landscapes and the applicability of the characteristic form concept (Van Steijn 2002). Interdisciplinary studies have been conducted on long-term landscape evolution in South Africa considering sustainability (Marker 2003) or on geomorphic processes in Scotland concerning geo-ecological landscape management (Gordon et al 2001(Gordon et al , 2002. Although the concept is widely accepted in general geomorphology and numerous examples exist for its application and integration there are still a number of unanswered research questions.…”

Section: General Application On Geomorphic System Studiesmentioning

confidence: 99%

Sensitivity and path dependence of mountain permafrost systems

Verleysdonk

Krautblatter

Dikau

2011

Geografiska Annaler: Series A, Physical Geography

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This article is an attempt to transfer a classical geomorphological concept -the sensitivity concept by Brunsden and Thornes -onto mountain permafrost systems. Focus is put on the impulses applied on the system and its subsequent response. The system state, the ratio between sensitivity and resistivity, as well as all system components and the external impulses are understood to be variable in space and time. In order to address sensitivity and path dependence in mountain permafrost systems, not only the present system configuration but also their historical development and possible future attractors have to be analysed. Important elements are the system configuration, variable impulses and thresholds, processes and process rates and internal feedbacks. The Zugspitze in the Northern Calcareous Alps at the German/Austrian border is chosen as a test site for the applicability of the sensitivity concept on mountain permafrost systems due to the high quantity of research conducted there and the significant impact of climate change on the periglacial system. Further aspects include the consequences of the Eibsee Bergsturz event in 3700 BP in terms of path dependence and geomorphic response time. With this conceptual approach, we hope (1) to enhance the interlinkage between periglacial geomorphology and other sub-disciplines of geomorphology, (2) to contribute to the strengthening of the conceptual basis of periglacial geomorphology, and, therefore, (3) to strengthen the possibilities for holistic exchange within the cryospheric research community.

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The Knysna Basin, South Africa: geomorphology, landscape sensitivity and sustainability

Cited by 14 publications

References 13 publications

Piloting a social-ecological index for measuring flood resilience: A composite index approach

Piloting a social-ecological index for measuring flood resilience: A composite index approach

Spatial variation in abundance and diversity of the smaller surface and near‐surface eelgrass‐associated intertidal macrobenthos within a warm‐temperate estuarine bay in the Garden Route National Park, RSA

Sensitivity and path dependence of mountain permafrost systems

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