CO , nitrogen, and diversity differentially affect seed production of prairie plants 2
... seed production responses to nitrogen deposition in Minnesota prairies, we caution against relying on them for predictive purposes without a mechanistic understanding of how resource availability and biotic interactions affect seed production. Key words: diversity; elevated CO2; fecundity; global ch ...
... seed production responses to nitrogen deposition in Minnesota prairies, we caution against relying on them for predictive purposes without a mechanistic understanding of how resource availability and biotic interactions affect seed production. Key words: diversity; elevated CO2; fecundity; global ch ...
CO2, nitrogen, and diversity differentially affect seed production of
... seed production responses to nitrogen deposition in Minnesota prairies, we caution against relying on them for predictive purposes without a mechanistic understanding of how resource availability and biotic interactions affect seed production. Key words: diversity; elevated CO2; fecundity; global ch ...
... seed production responses to nitrogen deposition in Minnesota prairies, we caution against relying on them for predictive purposes without a mechanistic understanding of how resource availability and biotic interactions affect seed production. Key words: diversity; elevated CO2; fecundity; global ch ...
MAGNITUDE AND IMPLICATIONS OF GENE
... variants, immigration of genes from domesticated populations is likely to reduce total genetic diversity within reserves and potentially lower their fitness. The prudent position on gene flow in reserves, therefore, is to limit it as much as possible. Pollen gene flow can be eliminated in ex situ pl ...
... variants, immigration of genes from domesticated populations is likely to reduce total genetic diversity within reserves and potentially lower their fitness. The prudent position on gene flow in reserves, therefore, is to limit it as much as possible. Pollen gene flow can be eliminated in ex situ pl ...
Factors influencing seedling recruitment in a critically endangered
... differences in seedling recruitment between burned and unburned sites requires taking into account a species’ Fig. 1. Sarracenia rubra ssp. alabamensis. Location of the remaining known populations in Alabama, USA (arrow). The filled circle (inset) indicates Autauga life history and site-related diff ...
... differences in seedling recruitment between burned and unburned sites requires taking into account a species’ Fig. 1. Sarracenia rubra ssp. alabamensis. Location of the remaining known populations in Alabama, USA (arrow). The filled circle (inset) indicates Autauga life history and site-related diff ...
using experimental evolution to investigate
... the fitness costs of adaptation to a novel environment without the confounding effect of linkage disequilibrium that arises from population history. This approach assumes that the genetic architecture of differences between closely related species can inform us about adaptive trade-offs that also wo ...
... the fitness costs of adaptation to a novel environment without the confounding effect of linkage disequilibrium that arises from population history. This approach assumes that the genetic architecture of differences between closely related species can inform us about adaptive trade-offs that also wo ...
using experimental evolution to investigate geographic range limits
... the fitness costs of adaptation to a novel environment without the confounding effect of linkage disequilibrium that arises from population history. This approach assumes that the genetic architecture of differences between closely related species can inform us about adaptive trade-offs that also wo ...
... the fitness costs of adaptation to a novel environment without the confounding effect of linkage disequilibrium that arises from population history. This approach assumes that the genetic architecture of differences between closely related species can inform us about adaptive trade-offs that also wo ...
FACTORS AFFECTING POLLINATION AND SEED SET OF A RARE
... along the Pacific Coast of California (Figure 1). In Humboldt County, it occurs primarily on roadsides, skid roads, recent clear-cut areas and other ruderal areas. As with other pioneer or disturbance-related species, S. malachroides appears to be a short-lived perennial. Populations senesce between ...
... along the Pacific Coast of California (Figure 1). In Humboldt County, it occurs primarily on roadsides, skid roads, recent clear-cut areas and other ruderal areas. As with other pioneer or disturbance-related species, S. malachroides appears to be a short-lived perennial. Populations senesce between ...
Restoration Biology: A Population Biology Perspective
... fective population size, severe inbreeding depression, and a decrease in the adaptive evolutionary potential of the population (Barrett & Kohn 1991). How much genetic variation exists within a population of a given size and growth rate, and how it changes over time, are thus important to the long-te ...
... fective population size, severe inbreeding depression, and a decrease in the adaptive evolutionary potential of the population (Barrett & Kohn 1991). How much genetic variation exists within a population of a given size and growth rate, and how it changes over time, are thus important to the long-te ...
Condition index monitoring supports conservation priorities for the
... changes in condition in response to seasonal, yearly or sitespecific environmental change. Instead, these species tended to be in good body condition year round and had higher CORT levels when breeding compared with moult, as reported for many northern hemisphere passerines (Breuner and Orchinik, 20 ...
... changes in condition in response to seasonal, yearly or sitespecific environmental change. Instead, these species tended to be in good body condition year round and had higher CORT levels when breeding compared with moult, as reported for many northern hemisphere passerines (Breuner and Orchinik, 20 ...
Author`s personal copy
... Our results revealed that the seed addition treatment significantly increased seedling survivorship for all three species. E. edulis seedling survival probability increased in the addition treatment in the two stand types. However, for S. guianensis and V. bicuhyba this effect depended strongly on ar ...
... Our results revealed that the seed addition treatment significantly increased seedling survivorship for all three species. E. edulis seedling survival probability increased in the addition treatment in the two stand types. However, for S. guianensis and V. bicuhyba this effect depended strongly on ar ...
Antagonistic effects of seed dispersal and herbivory
... Knight (2004) recognized six life-history stages for demographic analysis of T. grandiflorum: germinant (germinated seed with roots; no leaves are produced in the first year following seed dispersal), seedling (a single cotyledon), oneleaf plants, small three-leaved plants (< 5 cm leaf length), larg ...
... Knight (2004) recognized six life-history stages for demographic analysis of T. grandiflorum: germinant (germinated seed with roots; no leaves are produced in the first year following seed dispersal), seedling (a single cotyledon), oneleaf plants, small three-leaved plants (< 5 cm leaf length), larg ...
Seed selection by earthworms: chemical seed properties
... Satchellius mammalis ingest seeds of chalk grasslands according to seed oil content as well as their size. This suggests that seed ingestion might be an ‘active’ ingestion process for nutritive purposes, i.e. granivory. Other types of chemical compounds might attract earthworms, such as protein cont ...
... Satchellius mammalis ingest seeds of chalk grasslands according to seed oil content as well as their size. This suggests that seed ingestion might be an ‘active’ ingestion process for nutritive purposes, i.e. granivory. Other types of chemical compounds might attract earthworms, such as protein cont ...
Species richness and evenness respond in a
... We test these two alternate mechanisms over one growing season in a greenhouse experiment with prairie microcosms filled with field soil. We recognize that longer-term and larger-scale processes are not included in short-term greenhouse experiments using microcosms. However, we focus here on local c ...
... We test these two alternate mechanisms over one growing season in a greenhouse experiment with prairie microcosms filled with field soil. We recognize that longer-term and larger-scale processes are not included in short-term greenhouse experiments using microcosms. However, we focus here on local c ...
taraxacum officinale pollen depresses seed set of montane
... species sampled, but was found at low amounts on the stigmas of three species, from which we selected our two focal species. We also carried out pollinator observations in areas where Taraxacum and the candidate species coflowered, to see if the plants shared pollinators. These observations were car ...
... species sampled, but was found at low amounts on the stigmas of three species, from which we selected our two focal species. We also carried out pollinator observations in areas where Taraxacum and the candidate species coflowered, to see if the plants shared pollinators. These observations were car ...
the Study of Mutualistic Benefits To Plants In Myrmecochory
... adaptations of a diaspore ensure that the seed is taken to a more suitable site for establishment. The nutrient enrichment hypothesis was first developed in a myrmecochorous system by Beattie and Culver (1982), stating that seeds are placed in microsites that may be dense in available nutrients whic ...
... adaptations of a diaspore ensure that the seed is taken to a more suitable site for establishment. The nutrient enrichment hypothesis was first developed in a myrmecochorous system by Beattie and Culver (1982), stating that seeds are placed in microsites that may be dense in available nutrients whic ...
Sex allocation, pollen limitation and masting in whitebark pine
... when referring to either) for each tree. We used cones per branch as a metric of year to year changes in reproductive output, because the number of reproductive branches would not have changed for this slow-growing tree over the relatively short (5–8 years) period of our study. Because the observed ...
... when referring to either) for each tree. We used cones per branch as a metric of year to year changes in reproductive output, because the number of reproductive branches would not have changed for this slow-growing tree over the relatively short (5–8 years) period of our study. Because the observed ...
Management and conservation of the kelp species Laminaria
... Abstract – Marine protected areas (MPAs) have been depicted as a useful tool for improving fishery management and protecting biodiversity. For example, by acting as source populations, MPAs may provide a spillover of adults/propagules, enhancing recruitment to surrounding, non-protected waters. Howe ...
... Abstract – Marine protected areas (MPAs) have been depicted as a useful tool for improving fishery management and protecting biodiversity. For example, by acting as source populations, MPAs may provide a spillover of adults/propagules, enhancing recruitment to surrounding, non-protected waters. Howe ...
Impacts of insect herbivores on rare plant populations
... and found that insect herbivory has important effects on the population dynamics of many, but not all, plant species. As a result, a major goal for the study of insect–plant interactions should be to understand when (for what species, at what times or places, or under what ecological conditions) ins ...
... and found that insect herbivory has important effects on the population dynamics of many, but not all, plant species. As a result, a major goal for the study of insect–plant interactions should be to understand when (for what species, at what times or places, or under what ecological conditions) ins ...
51 papers with abstracts
... AbstractWe describe chimpanzee seed dispersal in the tropical montane forest of Nyungwe National Park (NNP), Rwanda, for a total of three years from January 1998 through May 2000 and May 2006 through March 2007. Relatively few studies have examined chimpanzee seed dispersal in montane communities wh ...
... AbstractWe describe chimpanzee seed dispersal in the tropical montane forest of Nyungwe National Park (NNP), Rwanda, for a total of three years from January 1998 through May 2000 and May 2006 through March 2007. Relatively few studies have examined chimpanzee seed dispersal in montane communities wh ...
2.12 Population Genetics of Vernal Pool Plants: Theory, Data and
... small and/or fluctuating population sizes, these data suggest that genetic drift may influence the level and distribution of genetic variation in some populations of some vernal pool plant taxa. Populations influenced by genetic drift are expected to have reduced levels of genetic variation and high ...
... small and/or fluctuating population sizes, these data suggest that genetic drift may influence the level and distribution of genetic variation in some populations of some vernal pool plant taxa. Populations influenced by genetic drift are expected to have reduced levels of genetic variation and high ...
Neotropical Anachronisms: The Fruits the Gomphotheres Ate
... to figs or Spondias fruits, there is usually a much larger fruit crop than they can eat. 8) In present-day forests, a high proportion of a tree’s fruit crop rots in the tree or on the ground beneath it without being tasted by any potential dispersal agent. This is true even in those national parks w ...
... to figs or Spondias fruits, there is usually a much larger fruit crop than they can eat. 8) In present-day forests, a high proportion of a tree’s fruit crop rots in the tree or on the ground beneath it without being tasted by any potential dispersal agent. This is true even in those national parks w ...
Daviesia ovata 335.16 KB - Department of Parks and Wildlife
... 2001) criterion C2a(ii). Recent counts have shown that the species no longer meets this criterion and it is proposed to recommend to the Threatened Species Scientific Committee (TSSC) that the criteria be amended to C2a(i)+D based on a total population size of less that 250 mature individuals, a con ...
... 2001) criterion C2a(ii). Recent counts have shown that the species no longer meets this criterion and it is proposed to recommend to the Threatened Species Scientific Committee (TSSC) that the criteria be amended to C2a(i)+D based on a total population size of less that 250 mature individuals, a con ...
univERsity oF copEnhAGEn
... may be caused either by insects directly infesting the reproductive structures (flowers, fruits and seeds) or by insects attacking other parts of the tree, e.g. defoliators, which cause exhaustion of nutrient reserves, which in turn may diminish nutrient allocation for seed production (Koerber 1989) ...
... may be caused either by insects directly infesting the reproductive structures (flowers, fruits and seeds) or by insects attacking other parts of the tree, e.g. defoliators, which cause exhaustion of nutrient reserves, which in turn may diminish nutrient allocation for seed production (Koerber 1989) ...
Effect of high temperatures on cone opening and on the release and
... To carry out this experiment we selected mature and apparently intact P. radiata and P. pinaster cones from populations in Galicia (NW Spain). Ten cones were collected from 13 individuals of each species, their colour and position was not taken into account. A total of 260 pinecones were harvested a ...
... To carry out this experiment we selected mature and apparently intact P. radiata and P. pinaster cones from populations in Galicia (NW Spain). Ten cones were collected from 13 individuals of each species, their colour and position was not taken into account. A total of 260 pinecones were harvested a ...
Do plant-community-based grazing regimes lead to
... communities of an open inland sand ecosystem are used as ‘‘source’’, linked to less-developed sand habitats (‘‘sink’’) via sheep. Also other factors determining which species become dispersed under field conditions were tested: seed surface structure, seed mass, plant seed-releasing height and animal ...
... communities of an open inland sand ecosystem are used as ‘‘source’’, linked to less-developed sand habitats (‘‘sink’’) via sheep. Also other factors determining which species become dispersed under field conditions were tested: seed surface structure, seed mass, plant seed-releasing height and animal ...
Banksia brownii
Banksia brownii, commonly known as Feather-leaved Banksia or Brown's Banksia, is a species of shrub that grows in southwest Western Australia. An attractive plant with fine feathery leaves and large red-brown flower spikes, it usually grows as an upright bush around two metres (7 ft) high, but can also occur as a small tree or a low spreading shrub. First collected in 1829 and published the following year, it is placed in Banksia subgenus Banksia, section Oncostylis, series Spicigerae. There are two genetically distinct forms.B. brownii occurs naturally only in two population clusters between Albany and the Stirling Range in southwest Western Australia. In the Stirling Range it occurs among heath on rocky mountain slopes; further south it occurs among Jarrah woodland in shallow nutrient-poor sand. It is rare and endangered in its natural habitat, with all major populations currently threatened by Phytophthora cinnamomi dieback, a disease to which the species is highly susceptible. Other threats include loss of habitat, commercial exploitation and changes to the fire regime.Highly valued by Australia's horticultural and cut flower industries, B. brownii is widely cultivated in areas not exposed to dieback. It prefers a sheltered position in soil with good drainage, and must be provided with some moisture over summer.