Search results | Digital Grinnell

Title: CAFOs, Conflict, and Compromise: An Ethnographic Approach to Attitudes Towards Livestock Production and Related Conflict in Iowa
Description: Concentrated animal feeding operations (CAFOs) are agricultural operations where animals are kept and raised in confined situations. .
Date Created: 2016
PID: grinnell:18956

Title: Contrasting soil-texture niches facilitate coexistence of two congeneric plants that differ in competitive ability
Description: We investigated how plant species' responses to soil texture might affect coexistence by analysing distributions, seedling emergence and performance, and competitive abilities of the winter annuals Clarkia speciosa ssp. polyantha and C. xantiana ssp. xantiana.
Date Created: 2017
PID: grinnell:26657

Title: Does probability of occurrence relate to population dynamics?
Description: The objective of this study is to analyse how demographic parameters (intrinsic growth rate r and carrying capacity) relate to realized niches
Date Created: 2014
PID: grinnell:26656

Title: Experimental Studies of Adaptation in Clarkia Xantiana. I. Sources of Trait Variation Across a Subspecies Border
Description: We report fndings of reciprocal transplant experiments intended to tease apart the roles of differentiation and plasticity in producing phenotypic variation across a geographic border between two plant subspecies. Clarkia xantiana ssp. xantiana and C. xantiana ssp. parvifora are California-endemic annuals that replace each other along a westG??east gradient of declining precipitation.
Date Created: 2004
PID: grinnell:26666

Title: Henry S. Conard Publications, Selected Conard Publications 1905-1952
Description: List of selected publications by Henry S. Conard. dated 1905-1952
Date Created: 1952
PID: grinnell:202

Title: Ken Christiansen Collembola Collection, Collembola database, Christiansen Collembola collection, Collembola collection
Description: This database includes all records of Collembola which are or were in the Collection of K. Christiansen. The records are mainly from North America but include some specimens from Mexico and Lebanon, Syria and China
Date Created: 2006
PID: grinnell:13118

Title: Local adaptation and range boundary formation in response to complex environmental gradients across the geographical range of Clarkia xantiana ssp. Xantiana
Description: Using field measurements, two common garden studies, and QST-FST analyses, we examined environmental and genetic influences on plant phenotype across the geographical range of Clarkia xantiana ssp. xantiana.
Date Created: 2014
PID: grinnell:26659

Title: The effects of floral display on pollinator visitation vary among populations of Phacelia linearis (Hydrophyllaceae)
Description: Individual plants in gynodioecious populations of Phacelia linearis (Hydrophyllaceae) vary in flower gender, flower size, and flower number. This paper reports the effects of variation in floral display on the visitation behaviour of this species' pollinators (mainly pollen-collecting solitary bees) in several natural and three experimental plant populations, and discusses the results in terms of the consequences for plant fitness.
Date Created: 1991
PID: grinnell:26665

Title: Wood Anatomy of Darwiniothamnus, Lecocarpus, and Macraea (Asteraceae)
Description: The genera Darwiniothamnus Harling, Lecocarpus Decaisne, and Macraea Hook. f. are endemic to the Galapagos Islands. Although wood anatomy of Lecocarpus has been considered by Carlquist (1958) and Eliasson (1971), the material available hitherto has been twigs rather than mature wood. The other two genera have not been studied with respect to wood anatomy.
Date Created: 1982
PID: grinnell:26661

Title: Wood Anatomy of Hydrophyllaceae. I. Eriodictyon
Description: Hydrophyllaceae is a characteristically herbaceous family; only Eriodictyon Benth., Wigandia H.B.K., and the monotypic Turricula Macbr. can be considered woody (stems attaining a diameter of more than 1 em). Are plants such as these relicts from a woody ancestry, or is the family secondarily woody?
Date Created: 1983
PID: grinnell:26662