@article{fdi:010082037,
  title = {{S}easonal variation in the ecology of tropical cavity-nesting {H}ymenoptera on {M}t. {K}ilimanjaro},
  author = {{M}ayr, {A}.{V}. and {R}equier, {F}abrice and {P}eters, {M}.{K}. and {S}teffan-{D}ewenter, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}nsect communities vary seasonally with changing climatic conditions and related changes in resource availability, strength of competition, or pressure by natural antagonists. {B}ut seasonal dynamics, particularly in tropical mountain ecosystems, are not well understood. {W}e monitored cavity-nesting {H}ymenoptera communities on {M}t. {K}ilimanjaro, {T}anzania, to analyse temporal patterns of nest-building activity, ecological rates, and life-history traits in relation to seasonal climatic variation and elevation. {W}e installed trap nests on 25 study sites in natural and  disturbed  habitat  types  covering  the  colline  (inf. 1,300  m)  and submontane zones (sup or = 1,300 m a.s.l). {W}e analysed patterns of seasonality in the cavity-nesting ecology of {H}ymenoptera at three different trophic levels -bees, caterpillar-hunting wasps and spider-hunting wasps-over a complete annual period, covering two rainy and two dry seasons. {N}est-building activity showed strong seasonal trends in all three investigated trophic levels and peaked at the end of the short rainy season at low elevations. {N}est-building activity was considerably higher and seasonal trends were better synchronised between the different trophic levels in the colline zone at low elevations. {W}e also detected seasonal patterns for parasitism and natural mortality rates, sex ratio, and development time, which varied with trophic level and between elevation levels. {C}limate and flower abundance were important predictors for seasonal patterns in nest-building activity, ecological rates and life-history traits. {T}hese results reveal that seasonal trends in nest-building activity of lowland {H}ymenoptera seem to be linked to changes in climate and resource availability that reflect the seasonal patterns in plant growth and flowering documented in  lowland  savanna  ecosystems.  {H}igher  resource  availability  also increased the sex ratio in bees towards the more costly females and enhanced their survival rates. {T}hese spatiotemporal links between climate, resources, ecological rates, and life-history traits indicate high sensitivity of plant-host-antagonist interactions to environmental changes.},
  keywords = {{TANZANIE} ; {ZONE} {TROPICALE} ; {KILIMANDJARO} {MONT}},
  booktitle = {},
  journal = {{F}rontiers of {B}iogeography},
  volume = {13},
  numero = {3},
  pages = {e49389 [18  en ligne]},
  ISSN = {1948-6596},
  year = {2021},
  DOI = {10.21425/{F}5{FBG}49389},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082037},
}