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Browsing by Author "O'Farrell, Patrick J"

Now showing items 1-18 of 18

Above ground perennial plant biomass across an altitudinal and land-use gradient in Namaqualand, South Africa

Author: Anderson, PML ; Hoffman, MT ; O'Farrell, Patrick J Date: Aug 2010 This study set out to generate estimates of the standing perennial biomass for six different vegetation types, and associated upland and lowland habitats, across the altitudinal gradient presented by the Kamiesberg mountain range in the ... Read more
An African account of ecosystem service provision: Use, threats and policy options for sustainable livelihoods

Author: Egoh, Benis N ; O'Farrell, Patrick J ; Charef, A ; Gurney, LJ ; Koellner, T ; Abi, HN ; Egoh, Benis N ; Willemen, L Date: Dec 2012 Scientific work on ecosystem services has been growing globally as well as in Africa. Human dependence on provisioning ecosystem services in particular is mostly acknowledged in developing countries like those in Africa, where many people are ... Read more
Anticipating potential biodiversity conflicts for future biofuel crops in South Africa: Incorporating land cover information with Species Distribution Models

Author: Blanchard, Ryan ; O'Farrell, Patrick J ; Richardson, D Date: Oct 2012 Using spatial techniques to determine the threat of land-use change is a useful tool in mitigating against potential biodiversity losses. We investigate the potential suitability and likely impacts of energy crops not currently grown in South ... Read more
Assessing the impacts of Acacia mearnsii (black wattle) on grazing provision and livestock production in South Africa

Author: Yapi, T ; O'Farrell, Patrick J ; Dziba, LE ; Esler, K Date: Oct 2012 The central aim of this research is to develop a deeper understanding of the ecological impacts of A. mearnsiiinvasions on the functioning and productivity of rangelands in South Africa and their ability to sustain livestock production. Read more
Do ecosystem service maps and models meet stakeholders’ needs? A preliminary survey across sub-Saharan Africa

Author: Willcock, S ; Hooftman, D ; Sitas, Nadia E ; O'Farrell, Patrick J ; Hudson, MD ; Reyers, B ; Eigenbrod, F ; Bullock, JM Date: Apr 2016 To achieve sustainability goals, it is important to incorporate ecosystem service (ES) information into decision-making processes. However, little is known about the correspondence between the needs of ES information users and the data provided ... Read more
Ecosystem services, land-cover change, and stakeholders: finding a sustainable foothold for a semiarid biodiversity hotspot

Author: Reyers, B ; O'Farrell, Patrick J ; Cowling, RM ; Egoh, Benis N ; Le Maitre, David C ; Vlok, JHJ Date: 2009 Land-cover change has been identified as one of the most important drivers of change in ecosystems and their services. However, information on the consequences of land cover change for ecosystem services and human well-being at local scales ... Read more
Human response and adaptation to drought in the arid zone: lessons from southern Africa

Author: O'Farrell, Patrick J ; Anderson, PML ; Milton, SJ ; Dean, WRJ Date: Jan 2009 Human adaptation and response to drought is primarily through evasion or endurance. A review of historical agricultural practices in southern Africa demonstrates evidence of drought evasion response strategies in well-established transhumance ... Read more
An introduction to sustainability science and its links to sustainability assessment

Author: Audouin, Michelle A ; Burns, M ; Weaver, A ; Le Maitre, David C ; O'Farrell, Patrick J ; du Toit, R ; Nel, J Date: Sep 2015 In this chapter the authors explore two elements which arguably underlie all aspects of sustainability science, namely: an emphasis on the relationships between social, ecological and economic aspects in a systemic view of the world (section ... Read more
Local benefits of retaining natural vegetation for soil retention and hydrological services

Author: O'Farrell, Patrick J ; Donaldson, JS ; Hoffman, MT Date: Aug 2009 Renosterveld is a grassy shrubland with a diverse understory of geophytes. Exceptional plant diversity and endemism, combined with considerable fragmentation due to transformation to cropland, make this vegetation type a conservation priority. ... Read more
Making the most of South Africa’s natural capital

Author: Reyers, B ; Van Wilgen, BW ; Nel, JL ; Le Maitre, David C ; O'Farrell, Patrick J ; Wise, R ; Forsyth, GG ; Smith-Adao, Lindie B ; Ntshotsho, Phumza ; Egoh, Benis N Date: Nov 2008 Human actions have fundamentally changed the way the world’s ecosystems look and function. Our efforts to produce more food, fibre, and fuel, control our water supplies and protect ourselves from the elements (e.g. storms or predators) have ... Read more
Multi-functional landscapes in semi arid environments: implications for biodiversity and ecosystem services

Author: O'Farrell, Patrick J ; Reyers, B ; Le Maitre, David C ; Milton, SJ ; Egoh, Benis N ; Maherry, A ; Colvin, C ; Atkinson, D ; De Lange, Willem J ; Blignaut, JN ; Cowling, RM Date: Jun 2010 Synergies between biodiversity conservation objectives and ecosystem service management were investigated in the Succulent Karoo biome (83,000 km2) of South Africa, a recognised biodiversity hotspot. Our study complemented a previous biodiversity ... Read more
Natural hazards in a changing world: a case for ecosystem-based management

Author: Nel, JL ; Le Maitre, David C ; Nel, DC ; Reyers, B ; Archibald, S ; Van Wilgen, BW ; Forsyth, GG ; Theron, AK ; O'Farrell, Patrick J ; Mwenge Kahinda, Jean-Marc ; Engelbrecht, FA ; Kapangaziwiri, Evison ; Van Niekerk, Lara ; Barwell, L Date: May 2014 Communities worldwide are increasingly affected by natural hazards such as floods, droughts, wildfires and storm-waves. However, the causes of these increases remain underexplored, often attributed to climate changes or changes in the patterns ... Read more
Navigating complexity through knowledge coproduction: Mainstreaming ecosystem services into disaster risk reduction

Author: Reyers, B ; Nel, JL ; O'Farrell, Patrick J ; Sitas, Nadia E ; Nel, DC Date: Jun 2015 Achieving the policy and practice shifts needed to secure ecosystem services is hampered by the inherent complexities of ecosystem services and their management. Methods for the participatory production and exchange of knowledge offer an ... Read more
The possibilities and pitfalls presented by a pragmatic approach to ecosystem service valuation in an arid biodiversity hotspot

Author: O'Farrell, Patrick J ; De Lange, Willem J ; Le Maitre, David C ; Reyers, B ; Blignaut, JN ; Milton, SJ ; Atkinson, D ; Egoh, Benis N ; Maherry, A ; Colvin, C ; Cowling, RM Date: Jan 2011 Arid regions are home to unique fauna, flora, and vulnerable human populations, and present a challenge for sustainable land-use management. The authors undertook an assessment and valuation of three key services, grazing, tourism and water ... Read more
The prioritisation of invasive alien plant control projects using a multi-criteria decision model informed by stakeholder input and spatial data

Author: Forsyth, GG ; Le Maitre, David C ; O'Farrell, Patrick J ; Van Wilgen, BW Date: Jul 2012 Invasions by alien plants are a significant threat to the biodiversity and functioning of ecosystems and the services they provide. The South African Working for Water program was established to address this problem. It needs to formulate ... Read more
Remote sensing based ecosystem state assessment in the Sandveld region, South Africa

Author: Lück-Vogel, Melanie ; O'Farrell, Patrick J ; Roberts, W Date: Dec 2012 We present a remote sensing based approach for assessing ecosystem state or intactness to inform land use management and conservation planning. Using segmented multispectral medium resolution satellite imagery, parameters related to the image ... Read more
Safeguarding biodiversity and ecosystem services in the Little Karoo, South Africa

Author: Egoh, Benis N ; Reyers, B ; Carwardine, J ; Bode, M ; O'Farrell, Patrick J ; Wilson, KA ; Possingham, HP ; Rouget, M ; De Lange, Willem J ; Cowling, RM Date: Feb 2010 Global declines in biodiversity and the widespread degradation of ecosystem services have led to urgent calls to safeguard both. Responses to this urgency include calls to integrate the needs of ecosystem services and biodiversity into the ... Read more
Transdisciplinary research for systemic change: who to learn with, what to learn about and how to learn

Author: Roux, Dirk J ; Nel, Jeanne L ; Cundill, Georgina ; O'Farrell, Patrick J ; Fabricius, Christo Date: Sep 2017 A key aim of transdisciplinary research is for actors from science, policy and practice to co-evolve their understanding of a social–ecological issue, reconcile their diverse perspectives and co-produce appropriate knowledge to serve a common ... Read more

Now showing items 1-18 of 18

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