Détail de l'auteur
Auteur Teja Tscharntke (1952-) |
Documents disponibles écrits par cet auteur (8)
Affiner la rechercheFloral trait expression and plant fitness in reponse to below- and aboveground plant-animal interactions / Katja Poveda in Perspectives in Plant Ecology, Evolution and Systematics, 7 (2) (2005)
Titre : Floral trait expression and plant fitness in reponse to below- and aboveground plant-animal interactions Type de document : Imprimé Auteurs : Katja Poveda ; Ingolf Steffan-Dewenter ; Stefan Scheu ; Teja Tscharntke (1952-) Année de publication : 2005 Article en page(s) : 77-83 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Autoécologie (relations/interactions individus-espèces)
[CBNPMP-Thématique] Organisation trophique
[CBNPMP-Thématique] Interactions interspécifiques
[CBNPMP-Thématique] Stratégie de production de semences (fécondité)Mots-clés : Sinapis arvensis L. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=139249
in Perspectives in Plant Ecology, Evolution and Systematics > 7 (2) (2005) . - 77-83Poveda, Katja, Steffan-Dewenter, Ingolf, Scheu, Stefan, Tscharntke, Teja (1952-) 2005 Floral trait expression and plant fitness in reponse to below- and aboveground plant-animal interactions. Perspectives in Plant Ecology, Evolution and Systematics, 7(2): 77-83.Exemplaires (1)
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Titre : Importance of pollinators in changing landscapes for world crops Type de document : Tiré à part de revue Auteurs : Alexandra Maria Klein ; Bernard Vaissière ; James H. Cane ; Ingolf Steffan-Dewenter ; Saul A. Cunningham ; Claire Kremen ; Teja Tscharntke (1952-) Année de publication : 2007 Importance : 303-313 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Insectes Résumé : The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animal pollination. However, global production volumes give a contrasting perspective, since 60% of global production comes from crops that do not depend on animal pollination, 35% from crops that depend on pollinators, and 5% are unevaluated. Using all crops traded on the world market and setting aside crops that are solely passively self-pollinated, wind-pollinated or parthenocarpic, we then evaluated the level of dependence on animal-mediated pollination for crops that are directly consumed by humans. We found that pollinators are essential for 13 crops, production is highly pollinator dependent for 30, moderately for 27, slightly for 21, unimportant for 7, and is of unknown significance for the remaining 9. We further evaluated whether local and landscape-wide management for natural pollination services could help to sustain crop diversity and production. Case studies for nine crops on four continents revealed that agricultural intensification jeopardizes wild bee communities and their stabilizing effect on pollination services at the landscape scale. Lien pérenne : DOI : 10.1098/rspb.2006.3721 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134151 Klein, Alexandra Maria, Vaissière, Bernard, Cane, James H., Steffan-Dewenter, Ingolf, Cunningham, Saul A., Kremen, Claire, Tscharntke, Teja (1952-) 2007 Importance of pollinators in changing landscapes for world crops. Proceedings of the Royal Society. Biological Sciences, 274 : 303-313.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21778 JC Tiré à part Bureaux Conservation Consultable Documents numériques
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Article (2007)URL
Titre : Importance of pollinators in changing landscapes for world crops Type de document : Imprimé Auteurs : Alexandra Maria Klein ; Bernard Vaissière ; James H. Cane ; Ingolf Steffan-Dewenter ; Saul A. Cunningham ; Claire Kremen ; Teja Tscharntke (1952-) Année de publication : 2007 Article en page(s) : 303-313 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Insectes Résumé : The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animal pollination. However, global production volumes give a contrasting perspective, since 60% of global production comes from crops that do not depend on animal pollination, 35% from crops that depend on pollinators, and 5% are unevaluated. Using all crops traded on the world market and setting aside crops that are solely passively self-pollinated, wind-pollinated or parthenocarpic, we then evaluated the level of dependence on animal-mediated pollination for crops that are directly consumed by humans. We found that pollinators are essential for 13 crops, production is highly pollinator dependent for 30, moderately for 27, slightly for 21, unimportant for 7, and is of unknown significance for the remaining 9. We further evaluated whether local and landscape-wide management for natural pollination services could help to sustain crop diversity and production. Case studies for nine crops on four continents revealed that agricultural intensification jeopardizes wild bee communities and their stabilizing effect on pollination services at the landscape scale. Lien pérenne : DOI : 10.1098/rspb.2006.3721 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148921
in Proceedings of the Royal Society. Biological Sciences > 274 (2007) . - 303-313Klein, Alexandra Maria, Vaissière, Bernard, Cane, James H., Steffan-Dewenter, Ingolf, Cunningham, Saul A., Kremen, Claire, Tscharntke, Teja (1952-) 2007 Importance of pollinators in changing landscapes for world crops. Proceedings of the Royal Society. Biological Sciences, 274: 303-313.Documents numériques
Article (2007)URL
Titre : Increasing crop heterogeneity enhances multitrophic diversity across agricultural regions Type de document : Imprimé Auteurs : Clélia Sirami (1978-) ; Nicolas Gross ; Aliette Bosem Baillod ; Colette Bertrand ; Romain Carrié ; Annika Hass ; Laura Henckel ; Paul Miguet ; Carole Vuillot ; Audrey Alignier ; Jude Girard ; Péter Batáry ; Yann Clough ; Cyrille Violle ; David Giralt ; Gerard Bota ; Isabelle Badenhausser ; Gaëtan Lefebvre ; Bertrand Gauffre ; Aude Vialatte ; François Calatayud ; Assu Gil-Tena ; Lutz Tischendorf ; Scott Mitchell ; Kathryn Lindsay ; Romain Georges ; Samuel Hilaire ; Jordi Recasens i Guinjuan (1957-) ; Xavier Oriol Solé-Senan ; Irene Robleño ; Jordi Bosch ; Jose Antonio Barrientos ; Antonio Ricarte ; Maria Ángeles Marcos-Garcia ; Jesús Miñano ; Raphaël Mathevet ; Annick Gibon ; Jacques Baudry (1952-) ; Gérard Balent (1949-) ; Brigitte Poulin ; Françoise Burel ; Teja Tscharntke (1952-) ; Vincent Bretagnolle ; Gavin Siriwardena ; Annie Ouin ; Lluis Brotons ; Jean-Louis Martin ; Lenore Fahrig Année de publication : 2019 Article en page(s) : 16442-16447 Langues : Anglais (eng) Résumé : Agricultural landscape homogenization has detrimental effects on biodiversity and key ecosystem services. Increasing agricultural landscape heterogeneity by increasing seminatural cover can help to mitigate biodiversity loss. However, the amount of seminatural cover is generally low and difficult to increase in many intensively managed agricultural landscapes. We hypothesized that increasing the heterogeneity of the crop mosaic itself (hereafter “crop heterogeneity”) can also have positive effects on biodiversity. In 8 contrasting regions of Europe and North America, we selected 435 landscapes along independent gradients of crop diversity and mean field size. Within each landscape, we selected 3 sampling sites in 1, 2, or 3 crop types. We sampled 7 taxa (plants, bees, butterflies, hoverflies, carabids, spiders, and birds) and calculated a synthetic index of multitrophic diversity at the landscape level. Increasing crop heterogeneity was more beneficial for multitrophic diversity than increasing seminatural cover. For instance, the effect of decreasing mean field size from 5 to 2.8 ha was as strong as the effect of increasing seminatural cover from 0.5 to 11%. Decreasing mean field size benefited multitrophic diversity even in the absence of seminatural vegetation between fields. Increasing the number of crop types sampled had a positive effect on landscape-level multitrophic diversity. However, the effect of increasing crop diversity in the landscape surrounding fields sampled depended on the amount of seminatural cover. Our study provides large-scale, multitrophic, cross-regional evidence that increasing crop heterogeneity can be an effective way to increase biodiversity in agricultural landscapes without taking land out of agricultural production. Lien pérenne : DOI : 10.1073/pnas.1906419116 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148939
in Proceedings of the National Academy of Sciences of the United States of America > 116 (33) (July 2019) . - 16442-16447Sirami, Clélia (1978-), Gross, Nicolas, Bosem Baillod, Aliette, Bertrand, Colette, Carrié, Romain, Hass, Annika, Henckel, Laura, Miguet, Paul, Vuillot, Carole, Alignier, Audrey, Girard, Jude, Batáry, Péter, Clough, Yann, Violle, Cyrille, Giralt, David, Bota, Gerard, Badenhausser, Isabelle, Lefebvre, Gaëtan, Gauffre, Bertrand, Vialatte, Aude, Calatayud, François, Gil-Tena, Assu, Tischendorf, Lutz, Mitchell, Scott, Lindsay, Kathryn, Georges, Romain, Hilaire, Samuel, Recasens i Guinjuan, Jordi (1957-), Solé-Senan, Xavier Oriol, Robleño, Irene, Bosch, Jordi, Barrientos, Jose Antonio, Ricarte, Antonio, Marcos-Garcia, Maria Ángeles, Miñano, Jesús, Mathevet, Raphaël, Gibon, Annick, Baudry, Jacques (1952-), Balent, Gérard (1949-), Poulin, Brigitte, Burel, Françoise, Tscharntke, Teja (1952-), Bretagnolle, Vincent, Siriwardena, Gavin, Ouin, Annie, Brotons, Lluis, Martin, Jean-Louis, Fahrig, Lenore 2019 Increasing crop heterogeneity enhances multitrophic diversity across agricultural regions. Proceedings of the National Academy of Sciences of the United States of America, 116(33): 16442-16447.Documents numériques
Article (2019)URL
Titre : Local diversity or arable weeds increases with landscape complexity Type de document : Imprimé Auteurs : Doreen Gabriel (1976-) ; Carsten Thies ; Teja Tscharntke (1952-) Année de publication : 2005 Article en page(s) : 85-93 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Biodiversité
[CBNPMP-Thématique] Mauvaises herbes
[CBNPMP-Thématique] Menace sur la biodiversité
[CBNPMP-Thématique] Richesse spécifique du paysage
[CBNPMP-Thématique] Science du paysage, division de l'espace en individualités, éléments du paysageRésumé : Patterns of plant diversity are often related to local site conditions and to competitive interactions, but landscape context may also be important for local plant species richness. This is shown here by analysing the relationship between landscape complexity and local species richness of arable weeds in wheat fields. The fields were located in 18 landscapes characterised by a gradient in landscape complexity from structurally complex to structurally simple (39–94% arable land). We quantified local site conditions, field management intensity and landscape characteristics, and used principle component analyses to ordinate the environmental variables. The percentage of arable land was negatively correlated with perimeter–area ratio, habitat-type diversity and topographical heterogeneity, but landscape characteristics did not correlate with local site conditions and field management intensity. The number of plant species was mainly related to landscape characteristics and to a lesser extent to field management intensity (nitrogen fertilisation), whereas local soil characteristics did not contribute to the explanation of arable weed richness. In a geographic scale analysis using circular landscape sectors ranging from 1 km up to 5 km diameter, the predictive power of landscape complexity for local plant species richness was strongest at 2 km indicating a scale-dependent relationship between landscape context and plant species richness. Our results support the hypothesis that local plant species richness in arable fields is greatly influenced by processes operating at the landscape scale. Seed rain from ruderal source habitats and disturbed edges may be the most important underlying process. Lien pérenne : DOI : 10.1016/j.ppees.2005.04.001 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=139250
in Perspectives in Plant Ecology, Evolution and Systematics > 7 (2) (2005) . - 85-93Gabriel, Doreen (1976-), Thies, Carsten, Tscharntke, Teja (1952-) 2005 Local diversity or arable weeds increases with landscape complexity. Perspectives in Plant Ecology, Evolution and Systematics, 7(2): 85-93.Exemplaires (1)
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