Zobrazeno 1 - 10
of 110
pro vyhledávání: '"John S Donaldson"'
Publikováno v:
PeerJ, Vol 6, p e5654 (2018)
Most pollination ecosystem services studies have focussed on wild pollinators and their dependence on natural floral resources adjacent to crop fields. However, managed pollinators depend on a mixture of floral resources that are spatially separated
Externí odkaz:
https://doaj.org/article/8fafee0336044adb984209bc81877098
Publikováno v:
Nature. 608(7922)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::885be6ca38a8aeaff39aa5fe57a5eb59
https://pubmed.ncbi.nlm.nih.gov/35945372
https://pubmed.ncbi.nlm.nih.gov/35945372
Publikováno v:
South African Journal of Botany. 127:80-90
This study investigates the population structure and life history traits of the Critically Endangered cycad, Encephalartos latifrons. Populations of E. latifrons have been considered functionally extinct because no natural recruitment has been observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::271b9634f78af6f113e7643591e5f4ba
https://doi.org/10.1016/j.sajb.2019.08.034
https://doi.org/10.1016/j.sajb.2019.08.034
Autor:
Neil A Brummitt, Steven P Bachman, Janine Griffiths-Lee, Maiko Lutz, Justin F Moat, Aljos Farjon, John S Donaldson, Craig Hilton-Taylor, Thomas R Meagher, Sara Albuquerque, Elina Aletrari, A Kei Andrews, Guy Atchison, Elisabeth Baloch, Barbara Barlozzini, Alice Brunazzi, Julia Carretero, Marco Celesti, Helen Chadburn, Eduardo Cianfoni, Chris Cockel, Vanessa Coldwell, Benedetta Concetti, Sara Contu, Vicki Crook, Philippa Dyson, Lauren Gardiner, Nadia Ghanim, Hannah Greene, Alice Groom, Ruth Harker, Della Hopkins, Sonia Khela, Poppy Lakeman-Fraser, Heather Lindon, Helen Lockwood, Christine Loftus, Debora Lombrici, Lucia Lopez-Poveda, James Lyon, Patricia Malcolm-Tompkins, Kirsty McGregor, Laura Moreno, Linda Murray, Keara Nazar, Emily Power, Mireya Quiton Tuijtelaars, Ruth Salter, Robert Segrott, Hannah Thacker, Leighton J Thomas, Sarah Tingvoll, Gemma Watkinson, Katerina Wojtaszekova, Eimear M Nic Lughadha
Publikováno v:
PLoS ONE, Vol 10, Iss 8, p e0135152 (2015)
Plants provide fundamental support systems for life on Earth and are the basis for all terrestrial ecosystems; a decline in plant diversity will be detrimental to all other groups of organisms including humans. Decline in plant diversity has been har
Externí odkaz:
https://doaj.org/article/1e4ae67280624da8b7b52ccea6a931e3
Autor:
Gregory D. Duckworth, Annalie Melin, Jonathan F. Colville, Ruhan Slabbert, John S. Donaldson, Jeremy J. Midgley, Mathieu Rouget, Res Altwegg
Publikováno v:
Journal of Apicultural Research
Honey bees are the most economically important crop pollinator worldwide. They depend on a diversity of pollen for reproduction and colony growth. However, the influence of landscape composition on diversity and quantity of pollen collection by honey
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60de7411114d6ce0998902b6d54bc4f3
http://agritrop.cirad.fr/595685/
http://agritrop.cirad.fr/595685/
Publikováno v:
Austral Ecology. 43:447-455
Cycads were a dominant plant functional type during the Mesozoic Era when atmospheric carbon dioxide [CO2] greatly exceeded current conditions. Cycads, now rare and endangered, are slow-growing perennial gymnosperms that develop carbon-rich structura
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f9ac1d51e9a3dee9c1381c23a16c905
https://doi.org/10.1111/aec.12581
https://doi.org/10.1111/aec.12581
Publikováno v:
Biodiversity and Conservation. 27:1961-1980
This study evaluates how a modelling approach to determine areas of suitable habitat for the Critically Endangered Albany cycad Encephalartos latifrons can assist in systematic conservation planning for this and other rare and threatened cycads. A ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29a12f91a1b35c0a333c9880b537aab4
https://doi.org/10.1007/s10531-018-1519-9
https://doi.org/10.1007/s10531-018-1519-9
Publikováno v:
South African Journal of Science, Vol 110, Iss 11/12, Pp 9-9 (2014)
Insect pollinators, both managed and wild, have become a focus of global scientific, political and media attention because of their apparent decline and the perceived impact of this decline on crop production. Crop pollination by insects is an essent
Externí odkaz:
https://doaj.org/article/8d63a20f880b437485e4bdf0feca6dba
Publikováno v:
Biodiversity and Conservation. 25:2153-2170
Although South African cycads are known to be declining in the wild, there is at present no broad-scale, quantitative analysis to support this view. In this study the fate of 626 individual cycads was assessed from 107 repeat photographs taken at 53
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::868c04e0cbb60afcd0897f4ec45b3229
https://doi.org/10.1007/s10531-016-1183-x
https://doi.org/10.1007/s10531-016-1183-x
Autor:
John S. Donaldson, J. De Wet Bösenberg
Publikováno v:
Cycad Biology and Conservation: The 9th International Conference on Cycad Biology.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9109fe69026c7ce23a16b38580bccfc9
https://doi.org/10.21135/893275389.006
https://doi.org/10.21135/893275389.006