Bumblebee movement in a fragmented agricultural landscape

Saville, Naomi; Dramstad, Wenche; Fry, Gary; Corbet, Sarah A.

doi:10.1016/s0167-8809(96)01100-0

Cited by 80 publications

(52 citation statements)

References 29 publications

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“…It is known that foragers do not fl y far away from their nest, generally up to a few meters (Butler 1951;Saville et al 1997;Ponchau et al 2006), which implies that the alpine queens should have founded their nest in 1999 at lower altitudes than they did the following years. It may be questioned whether if that phenomenon was an exceptional situation or if it was the norm before the drying and warming period starting in 2002.…”

Section: From Correlation To Relationmentioning

confidence: 99%

The effect of climatic variation on abundance and diversity of bumblebees: a ten years survey in a mountain hotspot

Iserbyt

Rasmont

2012

Annales de la Société entomologique de France (N.S.)

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Abstract. Even if climates play an evident role in the bumblebees distribution, at the present time, no research has been performed to test whether climatic parameters actually affect their abundance and diversity. For more than one decade (1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009), we monitored the bumblebee fauna of a mountain hotspot in the Eastern Pyrenees. We sampled each year, in July, the same hayfi eld habitat, resulting in the sampling of 28 species. We computed the correlation of the yearly abundance of the main species with several climatic parameters concerning temperature and precipitation. We separated the parameters measured during the bumblebee solitary phase and those measured during their social phase. Bumblebee fauna composition varied signifi cantly over years. In the 13 species considered, the abundance of 9 was correlated with at least one climatic parameter. The lowest abundance of bumblebees was correlated with hot and dry conditions during the month of August the year before sampling (the nuptial time of the founders). The highest overall abundance of bumblebees was observed during the social phase in the rainy months. Across years, climatic parameters seem to have strongly affected the composition of bumblebee fauna. Our results seem to indicate that hot and dry weather represent serious threat for most bumblebee species. The potential effects of Global Warming are discussed: they may cause a severe reduction of the mountain bumblebee diversity.Résumé. Les effets des variations climatiques sur labondance et la diversité des bourdons : une enquète de 10 ans dans une zone montagnarde riche en espèces. Même si les climats jouent un rôle évident dans la distribution des bourdons, aucune recherche n'a été menée jusqu'ici pour vérifi er quels paramètres climatiques affectent réellement leur abondance et leur diversité. Durant plus d'une décennie (1999-2009), nous avons surveillé la faune de bourdons d'une zone montagnarde riche en espèces dans les Pyrénées-Orientales. Nous avons échantillonné le même habitat de prés de fauche en juillet de chaque année, ce qui a aboutit à une liste de 28 espèces. Nous avons calculé la corrélation entre l'abondance annuelle des espèces principales et plusieurs paramètres liés à la température et aux précipitations. Nous avons séparé les paramètres mesurés durant la phase solitaire des bourdons de ceux mesurés durant leur phase sociale. La faune de bourdons varie signifi cativement d'année en année. Parmi les 13 espèces prises en compte, l'abondance de 9 d'entre-elles était correlée avec au moins un paramètre climatique. La plus faible abondance de l'ensemble des bourdons était correlée avec les conditions chaudes et sêches durant le mois d'août de l'année qui précède l'échantillonnage (la période nuptiale des fondatrices). La plus forte abondance moyenne des bourdons a été observée les mois les plus pluvieux durant la phase sociale. D'année en année, les paramètres climatiques semblent avoir fortement infl uencé la composition de la fau...

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Section: From Correlation To Relationmentioning

confidence: 99%

The effect of climatic variation on abundance and diversity of bumblebees: a ten years survey in a mountain hotspot

Iserbyt

Rasmont

2012

Annales de la Société entomologique de France (N.S.)

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“…by Banaszak (1980) and Saville et al (1997). Modification of the method was necessary 177 as forage distribution on the sites was too patchy and discontinuous for single straight-178 line transect walks to be effective.…”

Section: Nectar Foraging Surveys 174 175mentioning

confidence: 99%

The role of dietary breadth in national bumblebee (Bombus) declines: Simple correlation?

Connop

Hill

Steer

et al. 2010

Biological Conservation

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“…Bumblebee mark-reobservation experiments have provided detailed information on spatial foraging patterns (Dramstad, 1996;Saville et al, 1997). They have relied on marking bees individually with paint or numbered discs.…”

Section: Introductionmentioning

confidence: 99%

A modular system for trapping and mass-marking bumblebees: applications for studying food choice and foraging range

et al. 2006

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-Two new techniques for the study of bumblebee behavioural ecology are described. Interchangeable nest entrance modules allow (i) unimpeded bee traffic, (ii) trapping of incoming foragers for counting and removal of pollen loads; or (iii) colour marking of bees leaving the colony using dye powder. The forager traps captured all returning foragers while in place and 35% of them were carrying pollen loads. During the four week experiment, the percentage of mixed pollen loads decreased and the proportion of pollen loads from mass-flowering resources increased. The dye dispensers automatically marked 86% of foragers as they left the colony (approximately 28 bees per hour), and 37% of returning bees were marked. Different colours were used for bees in each colony, which could then be observed in the field.Bombus / pollen collection / mark-reobservation / foraging patterns / mass marking / experimental device

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Bumblebee movement in a fragmented agricultural landscape

Cited by 80 publications

References 29 publications

The effect of climatic variation on abundance and diversity of bumblebees: a ten years survey in a mountain hotspot

The effect of climatic variation on abundance and diversity of bumblebees: a ten years survey in a mountain hotspot

The role of dietary breadth in national bumblebee (Bombus) declines: Simple correlation?

A modular system for trapping and mass-marking bumblebees: applications for studying food choice and foraging range

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