Bee response to fire regimes in Mediterranean pine forests: The role of nesting preference, trophic specialization, and body size

Lazarina, Maria; Sgardelis, Stefanos P.; Tscheulin, Thomas; Kallimanis, Athanasios S.; Devalez, Jelle; Petanidou, Theodora

doi:10.1016/j.baae.2016.02.001

Cited by 34 publications

(34 citation statements)

References 37 publications

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“…In each site, we summed abundances across triplets and surveys of the entire season. Because insect responses (scale and type) may vary with life-history traits (Tscheulin et al 2011, Lazarina et al 2016, Neokosmidis et al 2018, we performed analyses at different ecological and taxonomic levels within the community, namely, insect guild, family, and species (for most abundant species) levels. Species richness and effective number of species (Jost 2006) were estimated per site at the guild and family level.…”

Section: Discussionmentioning

confidence: 99%

“…, Lazarina et al. , Neokosmidis et al. ), we performed analyses at different ecological and taxonomic levels within the community, namely, insect guild, family, and species (for most abundant species) levels.…”

Section: Methodsmentioning

confidence: 99%

“…At each site, seven surveys were conducted, three monthly rounds in 2012 (July-September) and four monthly rounds in 2013 (April-July), employing the common sampling method of UV-bright pantraps (Nielsen et al 2011). Although the pantrap sampling method has been reported to be insufficient for assessing the entire pollinator species richness and abundance (Popic et al 2013), it is an efficient procedure employed to sample pollinator communities in different habitat types, especially in Mediterranean ecosystems (e.g., Westphal et al 2008, Nielsen et al 2011, Lazarina et al 2016, L azaro et al 2016a. In each site and round, 10 triplets of UV-bright pantraps (standard-sized 500-mL bowls) of yellow, blue, and white color were placed with 10-m minimum distance between each other, in a linear transect and within 50-m distance from the center of each site.…”

Section: Samplingmentioning

confidence: 99%

“…Therefore, bee flight might be constrained by the species-specific foraging range. The latter is positively linked to bee body size (Gathmann andTscharntke 2002, Greenleaf et al 2007), with smaller bees utilizing resources at smaller spatial scales vs. bigger ones (Tscheulin et al 2011, Lazarina et al 2016, Neokosmidis et al 2018. This is well illustrated in the case of Halictidae, Andrenidae, and Megachilidae, three families with increasing average body size within the Aegean Archipelago; indeed, the average intertegular distance (a proxy of body size) of these three families in the Aegean are as follows: 1.34 mm (n = 119 species), 1.95 mm (85), and 2.19 mm (140), respectively (Cane 1987, T. Petanidou, the Melissotheque database).…”

Section: Response To Fire Severity: Spatial Scalementioning

confidence: 99%

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Moderate fire severity is best for the diversity of most of the pollinator guilds in Mediterranean pine forests

Lazarina

Devalez

Neokosmidis

et al. 2019

Ecology

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Fire, a frequent disturbance in the Mediterranean, affects pollinator communities. We explored the response of major pollinator guilds to fire severity, across a fire‐severity gradient at different spatial scales. We show that the abundance of all pollinator groups responded to fire severity, and that bees and beetles showed in addition a significant species‐diversity response. Bees, sawflies, and wasps responded to fire severity at relatively small spatial scales (250–300 m), whereas flies and beetles responded at larger spatial scales. The response of bees, sawflies, and wasps was unimodal, as predicted by the intermediate disturbance hypothesis, whereas flies and beetles showed a negative response. A possible explanation is that the observed patterns (spatial scale and type of response) are driven by taxa‐specific ecological and life‐history traits, such as nesting preference and body size, as well as the availability of resources in the postfire landscape. Our observational study provides an insight into the effect of fire severity on pollinators. However, future research exploring the explicit link between the pre‐ and postfire landscape structure and pollinator traits and responses is required for further establishment and understanding of cause–effect relationships.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Samplingmentioning

confidence: 99%

Section: Response To Fire Severity: Spatial Scalementioning

confidence: 99%

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Moderate fire severity is best for the diversity of most of the pollinator guilds in Mediterranean pine forests

Lazarina

Devalez

Neokosmidis

et al. 2019

Ecology

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“…However, the distribution (spatial occurrence and scale) and frequency of natural hazards can also structure communities. Indeed while some studies have sought to explore multiple components of exposure (Carbone & Aguilar, ; Lazarina et al, ; Ponisio, Wilkin, et al, ), potential additive and interactive impacts remain in much need of examination. Moreover, few studies have explicitly identified whether observed exposure was statistically extreme, and even fewer placed these events in context of historic or future climate patterns.…”

Section: Outlook and Future Directionsmentioning

confidence: 99%

Natural hazard threats to pollinators and pollination

Nicholson

Egan

2019

Global Change Biology

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Natural hazards are naturally occurring physical events that can impact human welfare both directly and indirectly, via shocks to ecosystems and the services they provide. Animal‐mediated pollination is critical for sustaining agricultural economies and biodiversity, yet stands to lose both from present exposure to natural hazards, and future climate‐driven shifts in their distribution, frequency, and intensity. In contrast to the depth of knowledge available for anthropogenic‐related threats, our understanding of how naturally occurring extreme events impact pollinators and pollination has not yet been synthesized. We performed a systematic review and meta‐analysis to examine the potential impacts of natural hazards on pollinators and pollination in natural and cultivated systems. From a total of 117 studies (74% of which were observational), we found evidence of community and population‐level impacts to plants and pollinators from seven hazard types, including climatological (extreme heat, fire, drought), hydrological (flooding), meteorological (hurricanes), and geophysical (volcanic activity, tsunamis). Plant and pollinator response depended on the type of natural hazard and level of biological organization observed; 19% of cases reported no significant impact, whereas the majority of hazards held consistent negative impacts. However, the effects of fire were mixed, but taxa specific; meta‐analysis revealed that bee abundance and species richness tended to increase in response to fire, differing significantly from the mainly negative response of Lepidoptera. Building from this synthesis, we highlight important future directions for pollination‐focused natural hazard research, including the need to: (a) advance climate change research beyond static “mean‐level” changes by better incorporating “shock” events; (b) identify impacts at higher levels of organization, including ecological networks and co‐evolutionary history; and (c) address the notable gap in crop pollination services research—particularly in developing regions of the world. We conclude by discussing implications for safeguarding pollination services in the face of global climate change.

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Nesting success of wood‐cavity‐nesting bees declines with increasing time since wildfire

Simanonok

Burkle

2019

Ecology and Evolution

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Bees require distinct foraging and nesting resources to occur in close proximity. However, spatial and temporal patterns in the availability and quantity of these resources can be affected by disturbances like wildfire. The potential for spatial or temporal separation of foraging and nesting resources is of particular concern for solitary wood‐cavity‐nesting bees as they are central‐place, short‐distance foragers once they have established their nest. Often the importance of nesting resources for bees have been tested by sampling foraging bees as a proxy, and nesting bees have rarely been studied in a community context, particularly postdisturbance. We tested how wood‐cavity‐nesting bee species richness, nesting success, and nesting and floral resources varied across gradients of wildfire severity and time‐since‐burn. We sampled nesting bees via nesting boxes within four wildfires in southwest Montana, USA, using a space‐for‐time substitution chronosequence approach spanning 3–25 years postburn and including an unburned control. We found that bee nesting success and species richness declined with increasing time postburn, with a complete lack of successful bee nesting in unburned areas. Nesting and floral resources were highly variable across both burn severity and time‐since‐burn, yet generally did not have strong effects on nesting success. Our results together suggest that burned areas may provide important habitat for wood‐cavity‐nesting bees in this system. Given ongoing fire regime shifts as well as other threats facing wild bee communities, this work helps provide essential information necessary for the management and conservation of wood‐cavity‐nesting bees.

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Bee response to fire regimes in Mediterranean pine forests: The role of nesting preference, trophic specialization, and body size

Cited by 34 publications

References 37 publications

Moderate fire severity is best for the diversity of most of the pollinator guilds in Mediterranean pine forests

Moderate fire severity is best for the diversity of most of the pollinator guilds in Mediterranean pine forests

Natural hazard threats to pollinators and pollination

Nesting success of wood‐cavity‐nesting bees declines with increasing time since wildfire

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