A5089790882- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Water resources management and optimization
- Plant Water Relations and Carbon Dynamics
- Flood Risk Assessment and Management
- Wildlife-Road Interactions and Conservation
- Groundwater and Watershed Analysis
- Land Use and Ecosystem Services
- Conservation, Biodiversity, and Resource Management
- Crustacean biology and ecology
- Hydrology and Drought Analysis
- Remote Sensing in Agriculture
- Soil and Water Nutrient Dynamics
- Historical Studies of British Isles
- Social Development and Education Research
- Water Quality and Pollution Assessment
- Rangeland Management and Livestock Ecology
- Climate variability and models
- Soil and Unsaturated Flow
- Water Governance and Infrastructure
- Aquatic Invertebrate Ecology and Behavior
- Water Quality Monitoring and Analysis
- Ecology and Vegetation Dynamics Studies
Rhodes University
2016-2025
Society for Conservation Biology
2020
University of Hong Kong
2004-2007
Future land cover changes may result in adjustments to biophysical drivers impacting on net ecosystem carbon exchange (NEE), catchment water use through evapotranspiration (ET), and the surface energy balance a change albedo. The Land Change Modeller (Idrisi Terrset 18.08) for 2000 2014 are used create future scenario of two with different management systems Eastern Cape Province year 2030. In S50E catchment, dualistic farming system, trend shows that grasslands represented 57% total area...
A food web based on the gut contents of consumers (invertebrates and fishes) in pools Tai Po Kau Forest Stream (TPKFS), Hong Kong (southern China), indicated importance periphyton fine organic particles; coarse particulate matter was a less important source despite its higher relative abundance this shaded hillstream. Stable isotope analysis consumer tissues undertaken to confirm result. IsoSource software used model n-isotope >n + 1-sources, so that contribution potential sources could be...
One of the most critical impacts COVID-19 pandemic was on food security. Food insecurity increased in many communities, with some showing signs resilience through autonomously creating community kitchens that enhanced security and built support networks. These initiatives filled gaps left by government programmes provided a lifeline for vulnerable communities during pandemic, fostering solidarity. This paper aims to investigate experiences perceptions kitchen managers addressing using town...
Prevailing notions of foodweb structure and trophic relations in fresh waters are based on research undertaken a limited range latitudes or habitat types. This limitation had led to the general view that stream food webs detritus-based with short chains simple interactions often dominated by few key species. We used gut-content analyses stable-isotope signatures characterize feeding relationships attributes benthic communities riffles 2 forest streams Hong Kong. compared them existing data...
Abstract Small dams represent an important local-scale resource designed to increase water supply reliability in many parts of the world where hydrological variability is high. There evidence that number farm has increased substantially over last few decades. These developments can have a substantial impact on downstream flow volumes and patterns, use ecological functioning. The study reports application modelling approach investigate uncertainty associated with simulating impacts several...
The proposed site for the construction of a new dam (Laleni Dam) on Tsitsa River in Eastern Cape, South Africa falls within high soil erosion zone, which is expected to affect lifespan dam. Estimating sediment yield catchment important from management perspective, and thus we designed this study assess applicability Modified Universal Soil Loss Equation (MUSLE). original MUSLE was applied Inxu sub catchment, upstream dam, over summer rainfall period extending October 2016 April 2017. A...
Abstract Small, off‐channel dams are generally ignored in impact assessments owing to limited information and spatial resolution issues. Previous research on South African rivers showed correlative links between high density of small associated reductions low flows, poorer water quality, impoverished aquatic macroinvertebrate communities that were dominated by opportunistic taxa instead specialist groups. Since usually with catchment transformation (for example, vineyards, stock farming...
Engaging water users when developing management plans is increasingly being embraced by a wide range of scientists in the sector as imperative for dealing with present-day resources challenges. However complexity presented unique catchment situations makes it difficult to prescribe 'one size fits all' solution localised resource South Africa well-known its population heterogeneity, which spreads into catchments, layering terms user types, needs and interests. This research presents novel...
Uncertainties associated with General Circulation Models (GCMs) and the downscaling methods used for regional or local scale hydrological modelling can result in substantial differences estimates of future water resources availability. This paper assesses skill nine statistically downscaled GCMs reproducing historical climate 15 catchments five regions South Africa. The identification skilled may reduce uncertainty predictions focus is on rainfall as show very similar patterns change...
Australian acacias have spread to many parts of the world. In South Africa, species such as A. mearnsii and dealbata are invasive. Consequently, more effort has focused on their clearing. a context increasing clearing costs, it is crucial develop innovative ways managing invasions. Our aim was understand biophysical properties in grasslands they relate grass production explore management implications. Aboveground biomass (AGB) determined using published allometric equation invaded northern...
Macrobrachium hainanense is a large palaemonid shrimp (total length up to |$7\;{\rm{cm}}$|) present at high densities (|$ \gt 2$| individuals |${{\rm{m}}^{ - 2}}$|) in pools of low-order forested streams Southern China. The study investigated the reproductive biology and sexual dimorphism this Tai Po Kau Forest Stream (TPK) Shing (TSS), Hong Kong. Recruitment occurred during wet season (May August). hainanense, truly freshwater species, has abbreviated larval development, populations had...
Macrobrachium hainanense is a large palaemonid shrimp (total length >7cm), present at high densities (>2 individuals m -2 ) in pools of low-order forested streams Hong Kong, Southern China. The study investigated the diet and trophic status this Tai Po Kau Forest Stream (TPK) Shing (TSS). was generalist predator that fed selectively on sedentary slow-moving prey (snails, chironomid larvae calamoceratid caddisflies) eating them disproportionately relative to their abundance pool benthic...
Abstract Ecological processes in freshwater lotic systems are disrupted when upstream–downstream connectivity is broken. Changes catchment land use, density of small dams, and instream impoundments result changes to thermal flow regimes, which turn affect natural biological turnover patterns rates, as well organism exchange dispersal. This study describes the development a comprehensive index for rivers, how this can be used spatial product prioritize areas importance within province...
Abstract To increase the resilience of regional water supply systems in South Africa face anticipated climatic changes and a constant demand, sources require diversification. Many water‐stressed metropolitan regions depend largely on surface to cover their demand. While river discharge data is widely available these regions, information groundwater resources – which could support source diversification scarce. Groundwater recharge key parameter that used estimate amounts can be sustainably...
Summary 1. Macrobrachium hainanense is a predatory palaemonid shrimp (total length >7 cm) that can be abundant [density 3–5 m −2 ; biomass 484–606 mg ash‐free dry mass (AFDM) ] in forest streams Hong Kong, China. This study investigated the growth and production of M. during 2001 2002 pools two forested (one third‐ one fourth‐order). 2. The tagged individuals was recorded situ compared with untagged shrimps laboratory tanks. Field estimates yielded similar rates 0.7 mm carapace (CL) per...
Abstract 1. Around the globe, instream infrastructures such as dams, weirs, and culverts associated with roads are wide‐spread continue to be constructed. There is limited documentation of smaller infrastructure because mixed regulation laws related construction, well difficulty in their size frequency waterscapes. 2. We reviewed evidence different methods used quantify environmental ecological responses (positive, negative, or neutral) culverts. 3. Most studies (78% 87) our review evaluated...
Key aspects of a river’s temperature regime are described by magnitudes, timing and durations thermal events, frequencies extreme exceedance events. To understand alterations to regimes, it is necessary describe time series based on these statistics. Classification sites their metrics, understanding spatial patterns statistics, provides powerful approach for comparing study against reference sites. Water dynamics should be viewed regionally, where regional divisions have an inherent...
Land cover change analysis was performed for three catchments in the rural Eastern Cape, South Africa, two time steps (2000 and 2014), to characterize landscape conversion trajectories sustained health. maps were derived: (1) from existing data (2000); (2) through object-based image (2014) of Landsat 8 imagery. facilitated using land labels developed identify trajectories. assigned each intersection at provide a thematic representation spatial distribution change. While use patterns are...