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Item type:Publication, Changes in oak (Quercus robur) photosynthesis after winter moth (Operophtera brumata) herbivory are not explained by changes in chemical or structural leaf traits(Public Library of Science, 2020-01-01)Insect herbivores have the potential to change both physical and chemical traits of their host plant. Although the impacts of herbivores on their hosts have been widely studied, experiments assessing changes in multiple leaf traits or functions simultaneously are still rare. We experimentally tested whether herbivory by winter moth (Operophtera brumata) caterpillars and mechanical leaf wounding changed leaf mass per area, leaf area, leaf carbon and nitrogen content, and the concentrations of 27 polyphenol compounds on oak (Quercus robur) leaves. To investigate how potential changes in the studied traits affect leaf functioning, we related the traits to the rates of leaf photosynthesis and respiration. Overall, we did not detect any clear effects of herbivory or mechanical leaf damage on the chemical or physical leaf traits, despite clear effect of herbivory on photosynthesis. Rather, the trait variation was primarily driven by variation between individual trees. Only leaf nitrogen content and a subset of the studied polyphenol compounds correlated with photosynthesis and leaf respiration. Our results suggest that in our study system, abiotic conditions related to the growth location, variation between tree individuals, and seasonal trends in plant physiology are more important than herbivory in determining the distribution and composition of leaf chemical and structural traits. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The evolution of tachinid pollination in Neotinea ustulata is related to floral cuticular composition and the combined high relative production of (Z)-11-C23/C25enes(Wiley, 2021-10-21)Among terrestrial orchids, and particularly among the subtribe Orchidinae, flies are underrepresented as pollinators. The European Neotinea ustulata, which developed specialized pollination by tachinid flies, is known to produce high relative concentrations of the floral cuticular alkenes (Z)‐11‐tricosene and (Z)‐11‐pentacosene (referred to as (Z)‐11‐C23/C25enes), which seem to be uncommon among orchid flowers. If the evolution of tachinid pollination is related to that of (Z)‐11‐C23/C25enes, we can expect that closely related species have a different floral chemical pattern and significantly small or no production of (Z)‐11‐C23/C25enes, independently of their pollinator guild identity (e.g., bees, flies, moths). We chemically compared the floral cuticular composition among Neotinea species, performed electrophysiological analyses, reconstructed the phylogenetic Orchidinae tree, and identified the evolutionary history of pollinator guild and (Z)‐11‐C23/C25enes production within the Orchidinae. Neotinea ustulata has evolved a markedly different floral cuticular composition compared to other Neotinea and produces both compounds ((Z)‐11‐C23/C25enes) in high relative quantities (i.e., above 8% in combination), which are detectable by tachinid antennae. Moreover, most Orchidinae taxa have minimal or no production of these alkenes, independently of the identity of their pollinator guild. Our ancestral reconstruction suggested that (Z)‐11‐C23/C25enes production was an evolutionary exaptation in Neotinea, whereas tachinid pollination was a unique evolutionary innovation for N. ustulata. Floral cuticular composition and, in particular, the combined production of (Z)‐11‐C23/C25enes at relatively high concentrations is intimately linked to the evolution of tachinid pollination within the Orchidinae. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Immature stages and host plant records for the skipper butterflies Xeniades orchamus (Cramer, 1777), Dubia dubia (Bell, 1932), and Tricrista canta (Evans, 1955) in the Peruvian Amazon (Lepidoptera: Hesperiidae: Hesperiinae: Hesperiini)(Magnolia Press, 2025)We describe the immature biology of three skipper species in the tribe Hesperiini (Hesperiidae: Hesperiinae), Xeniades orchamus Cramer in the subtribe Hesperiina, and Dubia dubia Bell and Tricrista canta Evans in the subtribe Moncina. All species were recorded feeding on Guadua weberbaueri Pilger (Poaceae: Bambusoideae: Bambuseae). One larva of each species was collected in nature at Finca Las Piedras, a biological research station located in the Amazonian lowlands of Madre de Dios, Peru. Larvae were reared to adulthood in an onsite laboratory using leaves from G. weberbaueri. We present measurements, descriptions, durations, and photographs of recorded larval instars and pupae, illustrations of larval head capsules, and details of the host plant.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Telipogon cruentilabrum (Orchidaceae: Oncidiinae): a new species from mid-western Ecuador, long misidentified as T. dendriticus(Magnolia Press, 2025)Telipogon cruentilabrum, from the cloud montane forest of mid-western Ecuador, is proposed as a new species. Plants of T. cruentilabrum are characterized by the yellow flowers with dark yellow longitudinal veins and tortuous, occasionally branched transversal lines; petals and lip with heavily undulate blades and irregularly reflexed margins; petals with a dark red-brown, swollen base; lip with a conspicuous radial, red-purple basal stain; a large, dark purple-red, elevated callus; anther profusely surrounded by three tufts of red-purple setae; and the stigma wide, sub-trapezoid, dark purple. This species has long been misidentified as T. dendriticus. Although in the holotype no callus is observed on the lip, and in its description and subsequent citations a callus is never mentioned. We provide here a detailed description, figures, distributional map and comparison with its morphological most similar species, T. tamboensis, and also include arguments to discriminate it from T. dendriticus.3