Conservation implications of fine scale population genetic structure of Ficus species in South African forests:
- Deng, Jun-Yin, Van Noort, Simon, Compton, Stephen G, Chen, Yan, Greeff, Jaco M
- Authors: Deng, Jun-Yin , Van Noort, Simon , Compton, Stephen G , Chen, Yan , Greeff, Jaco M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163838 , vital:41074 , ttps://doi.org/10.1016/j.foreco.2020.118387
- Description: Genetic considerations are rarely applied in forest conservation management strategies, but forest fragmentation can reduce pollen and seed dispersal both between and within isolated fragments. Gene flow and immigration rates determine the extent to which individual plants are related to each other at different distances from themselves. This gradation in relatedness is known as a population's fine scale spatial genetic structure (SGS). Specifically, reduced but clumped immigration from distant fragments reduces fine scale SGS, whereas reduced gene flow within fragments increases fine scale SGS. In addition, non-random mortality caused by post-dispersal ecological processes can also affect SGS. We studied the effects of fragmentation on the fine scale SGS of Ficus species with different habitat preferences and distributional ranges in an archipelago of South African forest patches.
- Full Text:
- Date Issued: 2020
- Authors: Deng, Jun-Yin , Van Noort, Simon , Compton, Stephen G , Chen, Yan , Greeff, Jaco M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163838 , vital:41074 , ttps://doi.org/10.1016/j.foreco.2020.118387
- Description: Genetic considerations are rarely applied in forest conservation management strategies, but forest fragmentation can reduce pollen and seed dispersal both between and within isolated fragments. Gene flow and immigration rates determine the extent to which individual plants are related to each other at different distances from themselves. This gradation in relatedness is known as a population's fine scale spatial genetic structure (SGS). Specifically, reduced but clumped immigration from distant fragments reduces fine scale SGS, whereas reduced gene flow within fragments increases fine scale SGS. In addition, non-random mortality caused by post-dispersal ecological processes can also affect SGS. We studied the effects of fragmentation on the fine scale SGS of Ficus species with different habitat preferences and distributional ranges in an archipelago of South African forest patches.
- Full Text:
- Date Issued: 2020
Nest site choice by the intertidal spider Desis formidabilis (Araneae: Desidae) and nest utilisation by its hymenopteran egg parasitoid
- Owen, Candice A, Van Noort, Simon, Compton, Stephen G, Coetzee, Julie A
- Authors: Owen, Candice A , Van Noort, Simon , Compton, Stephen G , Coetzee, Julie A
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444436 , vital:74240 , https://doi.org/10.1111/een.12675
- Description: Echthrodesis lamorali Masner, 1968 is the only known parasitoid of the eggs of the intertidal rocky shore spider Desis formidabilis O.P. Cam-bridge 1890 and is endemic to a small area of South Africa. The abun-dance of spider nests and parasitoid presence were assessed in rela-tion to their in‐ and between‐shore location at multiple sites within the distribution of E. lamorali along the Cape Peninsula (Western Cape, South Africa).
- Full Text:
- Date Issued: 2019
- Authors: Owen, Candice A , Van Noort, Simon , Compton, Stephen G , Coetzee, Julie A
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444436 , vital:74240 , https://doi.org/10.1111/een.12675
- Description: Echthrodesis lamorali Masner, 1968 is the only known parasitoid of the eggs of the intertidal rocky shore spider Desis formidabilis O.P. Cam-bridge 1890 and is endemic to a small area of South Africa. The abun-dance of spider nests and parasitoid presence were assessed in rela-tion to their in‐ and between‐shore location at multiple sites within the distribution of E. lamorali along the Cape Peninsula (Western Cape, South Africa).
- Full Text:
- Date Issued: 2019
Fig wasps (Hymenoptera: Chalcidoidea: Agaonidae, Pteromalidae) associated with Asian fig trees (Ficus, Moraceae) in southern Africa: Asian followers and African colonists: Insecta: Hymenoptera
- Van Noort, Simon, Wang, Rong, Compton, Stephen G
- Authors: Van Noort, Simon , Wang, Rong , Compton, Stephen G
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/479048 , vital:78255 , https://hdl.handle.net/10520/EJC143130
- Description: The Asian and Indo-Australasian fig tree species Ficus microcarpa and F. religiosa are widely-planted street and garden ornamentals in southern Africa and elsewhere. Like other fig trees, they depend for pollination on host specific fig wasps (Agaonidae). Their pollinators have also been widely introduced, and this allows the trees to become naturalised weeds. Both trees also support numerous non-pollinating fig wasps that can reduce seed or pollinator numbers, and a sub-set of these assemblages also now have wide distributions outside their native range. Two South African pollinators (Elisabethiella baijnathi, E. stuckenbergi), a galler (Otitesella uluzi) and a parasitoid (Sycoryctes species) occasionally succeed in reproducing in the figs of F. microcarpa, but in very small numbers.
- Full Text:
- Date Issued: 2013
- Authors: Van Noort, Simon , Wang, Rong , Compton, Stephen G
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/479048 , vital:78255 , https://hdl.handle.net/10520/EJC143130
- Description: The Asian and Indo-Australasian fig tree species Ficus microcarpa and F. religiosa are widely-planted street and garden ornamentals in southern Africa and elsewhere. Like other fig trees, they depend for pollination on host specific fig wasps (Agaonidae). Their pollinators have also been widely introduced, and this allows the trees to become naturalised weeds. Both trees also support numerous non-pollinating fig wasps that can reduce seed or pollinator numbers, and a sub-set of these assemblages also now have wide distributions outside their native range. Two South African pollinators (Elisabethiella baijnathi, E. stuckenbergi), a galler (Otitesella uluzi) and a parasitoid (Sycoryctes species) occasionally succeed in reproducing in the figs of F. microcarpa, but in very small numbers.
- Full Text:
- Date Issued: 2013
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