Results 131 to 140 of about 48,862 (265)

Causes of delayed angiosperm diversification: The photosynthetic revolution, increased opportunity costs of anti‐herbivore defenses, selection for qualitative toxins, and acceleration of plant–herbivore coevolution

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Why did it take so long for angiosperms to diversify after they arose? Here I consider the indirect but potentially crucial impact of the “photosynthetic revolution” on plant–herbivore coevolution. Increased vein density in fossil leaves implies a doubling in photosynthesis 125–100 million years ago.
Thomas J. Givnish
wiley   +1 more source

Dataset and R script used in "Local knowledge reconstructs historical resource use" published in Frontiers in Ecology and the Environment

open access: green, 2023
Leandro Castello   +16 more
openalex   +2 more sources

In situ ambient vibration modal analysis of saguaro cacti (Carnegiea gigantea)

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise The structural and dynamic properties of columnar cacti are key inputs for stability analyses; however, no previous studies have been able to resolve these properties from full‐scale tests in situ. Methods I present an approach using non‐destructive ambient vibration data to measure the resonance properties (modal frequencies and mode ...
Jeffrey R. Moore
wiley   +1 more source

Floral specialization for beetle pollination and its implications for pollen dispersal in an African orchid

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Pollination by beetles is relatively rare in orchids, and this has been attributed to the clumsy behavior of beetles being unsuitable for the precise pollen transfer mechanisms that characterize the orchid family. We investigated floral specialization for beetle pollination in the rare fire‐dependent South African orchid Disa elegans ...
Steven D. Johnson   +3 more
wiley   +1 more source

Fire avoidance and long‐term population decline in the endangered Florida ground lichen Cladonia perforata within a pyrogenic habitat

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Fire is a key ecological process that shapes ecosystems globally, yet fire adaptation strategies remain unclear for many species, especially for ground lichens that are reliant on pyrogenic landscapes but are evidently fire‐intolerant.
Sterling A. Herron   +6 more
wiley   +1 more source

Enhancing biodiversity: historical ecology and biogeography of the Santa Catalina Island ground squirrel, Otospermophilus beecheyi nesioticus. [PDF]

open access: yesR Soc Open Sci
Rick TC   +12 more
europepmc   +1 more source

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