Search Results - "SEYMOUR, COLLEEN L"

Global agricultural productivity is threatened by increasing pollinator dependence without a parallel increase in crop diversification by Aizen, Marcelo A., Aguiar, Sebastián, Biesmeijer, Jacobus C., Garibaldi, Lucas A., Inouye, David W., Jung, Chuleui, Martins, Dino J., Medel, Rodrigo, Morales, Carolina L., Ngo, Hien, Pauw, Anton, Paxton, Robert J., Sáez, Agustín, Seymour, Colleen L.

“…The global increase in the proportion of land cultivated with pollinator‐dependent crops implies increased reliance on pollination services. Yet agricultural…”
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Why have Madagascar's mammals, despite being closely‐related to African open‐habitat specialists, failed to radiate into open grasslands? by Joseph, Grant S., Seymour, Colleen L.

“…Seventy‐five percent of Madagascar is treeless C4‐grassland adapted to human‐lit fire, which likely succeeded pre‐human mosaics of forest, ericoids,…”
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Creating patches of native flowers facilitates crop pollination in large agricultural fields: mango as a case study by Carvalheiro, Luísa G., Seymour, Colleen L., Nicolson, Susan W., Veldtman, Ruan

“…1. As cropland increases, fields become progressively isolated from pollinators, leading to declines in pollinator-dependent crop productivity. With the rise…”
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A 2018 Horizon Scan of Emerging Issues for Global Conservation and Biological Diversity by Sutherland, William J., Butchart, Stuart H.M., Connor, Ben, Culshaw, Caroline, Dicks, Lynn V., Dinsdale, Jason, Doran, Helen, Entwistle, Abigail C., Fleishman, Erica, Gibbons, David W., Jiang, Zhigang, Keim, Brandon, Roux, Xavier Le, Lickorish, Fiona A., Markillie, Paul, Monk, Kathryn A., Mortimer, Diana, Pearce-Higgins, James W., Peck, Lloyd S., Pretty, Jules, Seymour, Colleen L., Spalding, Mark D., Tonneijck, Femke H., Gleave, Rosalind A.

“…This is our ninth annual horizon scan to identify emerging issues that we believe could affect global biological diversity, natural capital and ecosystem…”
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The importance of heuweltjie patch isolation, size, and quality for arthropods in the Succulent Karoo, South Africa by Davids, Liaam, Pryke, James S., Seymour, Colleen L.

“…A characteristic feature of Earth's drylands is the patchy nature of the vegetation, often referred to as a two‐phase mosaic landscape, comprised of a…”
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A Review of the Impacts of Roads on Wildlife in Semi-Arid Regions by Dean, W. Richard J., Seymour, Colleen L., Joseph, Grant S., Foord, Stefan H.

“…Roads now penetrate even the most remote parts of much of the world, but the majority of research on the effects of roads on biota has been in less remote…”
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Post-pollination barriers enable coexistence of pollinator-sharing ornithophilous Erica species by Coetzee, Anina, Spottiswoode, Claire N., Seymour, Colleen L.

“…Some evolutionary radiations produce a number of closely-related species that continue to coexist. In such plant systems, when pre-pollination barriers are…”
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Fire incongruities can explain widespread landscape degradation in Madagascar's forests and grasslands by Joseph, Grant S., Seymour, Colleen L., Rakotoarivelo, Andrinajoro R.

“…Societal Impact Statement The relationship between rainfall, fire and habitat can display incongruencies. The 2021 Malagasy Grassy Biomes Workshop identified…”
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A review of Madagascar's derived grasslands: Low palatability following anthropogenic fires may threaten food security by Joseph, Grant S., Rakotoarivelo, Andrinajoro R., Seymour, Colleen L.

“…Societal Impact Statement The 26th United Nations Climate Change Conference emphasised the need to modify practices that negatively impact biodiversity and…”
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Repeated surveying over 6 years reveals that fine-scale habitat variables are key to tropical mountain ant assemblage composition and functional diversity by Muluvhahothe, Mulalo M., Joseph, Grant S., Seymour, Colleen L., Munyai, Thinandavha C., Foord, Stefan H.

“…High-altitude-adapted ectotherms can escape competition from dominant species by tolerating low temperatures at cooler elevations, but climate change is…”
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A horizon scan of future threats and opportunities for pollinators and pollination by Brown, Mark J F, Dicks, Lynn V, Paxton, Robert J, Baldock, Katherine C R, Barron, Andrew B, Chauzat, Marie-Pierre, Freitas, Breno M, Goulson, Dave, Jepsen, Sarina, Kremen, Claire, Li, Jilian, Neumann, Peter, Pattemore, David E, Potts, Simon G, Schweiger, Oliver, Seymour, Colleen L, Stout, Jane C

“…Background. Pollinators, which provide the agriculturally and ecologically essential service of pollination, are under threat at a global scale. Habitat loss…”
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Termite Mounds Increase Functional Diversity of Woody Plants in African Savannas by Joseph, Grant S, Seymour, Colleen L, Cumming, Graeme S, Cumming, David H.M, Mahlangu, Zacheus

“…Fine-scale spatial heterogeneity influences biodiversity and ecosystem productivity at many scales. In savanna systems, Macrotermes termites, through forming…”
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Seasonal Movement Patterns of Urban Domestic Cats Living on the Edge in an African City by Simmons, Robert E, Seymour, Colleen L, George, Sharon T, Peters, Koebraa, Morling, Frances, O'Riain, M Justin

“…Domestic cats ( ) are amongst the most destructive invasive vertebrates globally, depredating billions of native animals annually. The size and seasonal…”
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Can rewilding with giant tortoises increase woody habitat and limit fire across Madagascar's grasslands? by Joseph, Grant S., Rakotoarivelo, Andrinajoro R., Pedrono, Miguel, Seymour, Colleen L.

“…Societal Impact Statement To better understand the impact of human settlement on vegetation distribution and disturbance regimes in Madagascar, the 2021…”
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Across Madagascar, treeless grasslands characterised by erosion gullies are named after forest and trees by Joseph, Grant S., Randriatsara, Fetraharimalala, Rakotoarivelo, Andrinajoro R., Rafidiarimanda, Ando A., Seymour, Colleen L.

“…Societal Impact Statement Debates about the impacts of human settlement on Madagascar's habitat have missed the Malagasy perspective. Using indigenous and…”
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Termite mounds as islands: woody plant assemblages relative to termitarium size and soil properties by Joseph, Grant S., Seymour, Colleen L., Cumming, Graeme S., Cumming, David H.M., Mahlangu, Zacheus

“…Questions: We investigated whether soils of small mounds resembled large mound or matrix soils, whether changes in plant composition reflected changes in…”
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Mean height increase in saplings of a keystone woody savanna species over 15 years similar to that over a single season by Seymour, Colleen L., Joseph, Grant S., Calitz, Wynand, Henschel, Joh R., Ramaswiela, Tshililo, van der Merwe, Helga

“…Woody structure, particularly that created by large trees, is crucial to savanna biodiversity pattern and process. We assessed changes in vertical and…”
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Escaping the flames: large termitaria as refugia from fire in miombo woodland by Joseph, Grant S., Seymour, Colleen L., Cumming, Graeme S., Mahlangu, Zacheus, Cumming, David H. M.

“…At finer scales, spatial heterogeneity can influence fire intensity and severity. To test whether Macrotermes termite mounds act as fire refugia for woody…”
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Large termitaria act as refugia for tall trees, deadwood and cavity-using birds in a miombo woodland by Joseph, Grant S, Cumming, Graeme S, Cumming, David H. M, Mahlangu, Zacheus, Altwegg, Res, Seymour, Colleen L

“…Landscape heterogeneity can play an important role in providing refugia and sustaining biodiversity in disturbed landscapes. Large Macrotermes (Isoptera)…”
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Madagascan highlands: originally woodland and forest containing endemic grasses, not grazing-adapted grassland by Joseph, Grant S, Seymour, Colleen L

“…Long considered a consequence of anthropogenic agropastoralism, the origin of Madagascar's central highland grassland is hotly disputed. Arguments that ancient…”
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