Search Results - "Jacobs, Shayne"

Eucalyptus invasions in riparian forests: Effects on native vegetation community diversity, stand structure and composition by Tererai, Farai, Gaertner, Mirijam, Jacobs, Shayne M., Richardson, David M.

“…[Display omitted] ► We examine changes in riparian forest traits related to Eucalyptus invasion. ► We used a gradient comparative approach which yielded…”
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The soil bacterial communities of South African fynbos riparian ecosystems invaded by Australian Acacia species by Slabbert, Etienne, Jacobs, Shayne Martin, Jacobs, Karin

“…Riparian ecosystem along rivers and streams are characterised by lateral and longitudinal ecological gradients and, as a result, harbour unique biodiversity…”
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Maize‐field complexity and farming system influence insectivorous birds’ contribution to arthropod herbivore regulation by Otieno, Nickson E., Jacobs, Shayne M., Pryke, James S.

“…The contribution of insectivorous birds to reducing crop damage through suppression of herbivory remains underappreciated, despite their role as cropland…”
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Resilience of Invaded Riparian Landscapes: The Potential Role of Soil-Stored Seed Banks by Tererai, Farai, Gaertner, Mirijam, Jacobs, Shayne M, Richardson, David M

“…We investigated the potential role of soil-stored seed banks in driving vegetation recovery under varying intensities of invasion by the alien tree Eucalyptus…”
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Microbial Communities in the Fynbos Region of South Africa: What Happens during Woody Alien Plant Invasions by Jacobs, Karin, Conradie, Tersia, Jacobs, Shayne

“…The Cape Floristic Region (CFR) is globally known for its plant biodiversity, and its flora is commonly referred to as fynbos. At the same time, this area is…”
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Imprint of overgrazing on the soil and vegetation of fertility islands in the degraded succulent Karoo, South Africa by Saaed, Muniem W., Jacobs, Shayne M., Masubelele, Mmoto L., Samuels, Igshaan M., Khomo, Lesego

“…Islands of fertility (IOF) emerge when vegetation exerts such a considerable influence on soil properties that sub‐canopies become significantly more fertile…”
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Invasive plant removal increases insect herbivory pressure on a native tree due to an increase in resource quality by Maoela, Malebajoa A., Esler, Karen J., Jacobs, Shayne M., Roets, Francois

“…Insect predator densities and plant nutritional status can affect insect herbivore densities, but these effects have not yet been assessed in the context of an…”
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Does the landscape functionality approach provide insight into rangeland conditions in the Tanqua Karoo region, South Africa? by Saaed, Manam, Jacobs, Shayne, Masubelele, Mmoto Leonard, Khomo, Lesego, Samuels, Igshaan

“…The harsh environmental conditions coupled with a long history of overgrazing have altered the ecology of the arid Tanqua Karoo rangelands in South Africa,…”
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Ecophysiological traits associated with the competitive ability of invasive Australian acacias by Morris, Taryn L., Esler, Karen J., Barger, Nichole N., Jacobs, Shayne M., Cramer, Michael D.

“…Aim We explored morphological and ecophysiological traits that enable invasive Australian acacias to compete with native species for resources (light, water…”
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Invasion, alien control and restoration: Legacy effects linked to folivorous insects and phylopathogenic fungi by Maoela, Malebajoa A., Jacobs, Shayne M., Roets, Francois, Esler, Karen J.

“…Invasive alien trees increase native tree stress and may increase attack by herbivores and pathogenic fungi. Alien tree removal should ameliorate such impacts…”
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Physiological responses to folivory and phytopathogens in a riparian tree, Brabejum stellatifolium, native to the fynbos biome of South Africa by Maoela, Malebajoa A., Esler, Karen J., Roets, Francois, Jacobs, Shayne M.

“…The canopies of many tree species sustain a large diversity of folivorous arthropods and phytopathogenic fungi. These organisms are thought to influence…”
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Restoration of invaded Cape Floristic Region riparian systems leads to a recovery in foliage-active arthropod alpha- and beta-diversity by Maoela, Malebajoa A, Roets, Francois, Jacobs, Shayne M, Esler, Karen J

“…The Cape Floristic Region of South Africa is a global biodiversity hotspot threatened by invasive alien plants (IAPs). We assessed the effect of plant…”
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Drought-tolerance of an invasive alien tree, Acacia mearnsii and two native competitors in fynbos riparian ecotones by Crous, Casparus J., Jacobs, Shayne M., Esler, Karen J.

“…Invasive alien plants (IAPs) have successfully invaded many riparian zones in South Africa, especially Australian Acacia spp. which are prevalent along…”
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Foliar nitrogen dynamics of an invasive legume compared to native non-legumes in fynbos riparian zones varying in water availability by Jacobs, Shayne M., Jacobsen, Anna L., Esler, Karen J., Pratt, R. Brandon, Drake, Deanne C., Crous, Casparus J.

“…The legume Acacia mearnsii invades South Africa’s fynbos riparian zones and may alter the nitrogen (N) dynamics and supply in these areas that typically…”
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Vegetation structure and composition at different elevational intervals in the arid Tankwa Karoo National Park, South Africa by Samuels, Mogamat Igshaan, Saaed, Manam, Jacobs, Shayne, Masubelele, Mmoto Leonard, Van der Merwe, Helga, Khomo, Lesego

“…Study area : The study was conducted in the Tankwa Karoo National Park, one of the driest areas in South Africa. Historic overgrazing has resulted in the poor…”
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Xylem Transport Safety and Efficiency Differ among Fynbos Shrub Life History Types and between Two Sites Differing in Mean Rainfall by Pratt, Robert B., Jacobsen, Anna L., Jacobs, Shayne M., Esler, Karen J.

“…Xylem safety and efficiency were analyzed for stems of evergreen shrubs that inhabit fynbos communities in the Mediterranean-type climate region of South…”
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Wood anatomical traits as a measure of plant responses to water availability: invasive Acacia mearnsii De Wild. compared with native tree species in fynbos riparian ecotones, South Africa by Crous, Casparus J, Jacobs, Shayne M, Esler, Karen J

“…Riparian ecotones in the fynbos biome of South Africa are heavily invaded by woody invasive alien species, which are known to reduce water supply to downstream…”
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The composition of the soil seedbank and its role in ecosystem dynamics and rehabilitation potential in the arid Tankwa Karoo Region, South Africa by Saaed, Manam WB, Jacobs, Shayne M, Masubelele, Mmoto L, Samuels, Igshaan, Khomo, Lesego, El-Barasi, Yacoub M

“…Very few soil seedbank studies have been conducted in South Africa, especially in arid rangelands. Insight into the soil seedbank could therefore improve…”
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Large African herbivores decrease herbaceous plant biomass while increasing plant species richness in a semi-arid savanna toposequence by Jacobs, Shayne M., Naiman, Robert J.

“…Herbivory is a major driver of ecosystem functioning in semi-arid African savannas, yet its impact on herbaceous biomass dynamics has been poorly understood…”
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Diet and seasonal dispersal of extralimital giraffe at Sanbona Wildlife Reserve, Little Karoo, South Africa by Gordon, Claire N, Eichenberger, Liesl, Vorster, Paul, Leslie, Alison J, Jacobs, Shayne M

“…South African giraffe (Giraffa camelopardalis giraffa) have been introduced as an extralimital species to private farms in the Little Karoo on the basis of…”
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