Seed dispersal effectiveness in three adjacent plant communities
... This study investigates the dispersal ability of seeds and fruits of plant species in three adjacent plant communities — xerothermic grassland, brushwood and woodland — through analysis of the soil seed bank and its changes at the borders of the communities. I tested the following null hypothesis: e ...
... This study investigates the dispersal ability of seeds and fruits of plant species in three adjacent plant communities — xerothermic grassland, brushwood and woodland — through analysis of the soil seed bank and its changes at the borders of the communities. I tested the following null hypothesis: e ...
Inquiline diversity of the purple pitcher plant (Sarracenia purpurea
... have also been shown to affect inquiline diversity (Miller and Kneitel 2005). Plants were selected in this study based on the appearance of equal size (i.e. size was not actually measured and quantified). Ultimately, it may be unrealistic to expect dispersal distance alone to have a significant impa ...
... have also been shown to affect inquiline diversity (Miller and Kneitel 2005). Plants were selected in this study based on the appearance of equal size (i.e. size was not actually measured and quantified). Ultimately, it may be unrealistic to expect dispersal distance alone to have a significant impa ...
Darwin`s Finches
... Zygophyllaceae – creosote bush family). Directional selection for increased bill size. (This and all future trends documented by Peter & Rosemary Grant.) ...
... Zygophyllaceae – creosote bush family). Directional selection for increased bill size. (This and all future trends documented by Peter & Rosemary Grant.) ...
Apparent competition with an invasive plant hastens the extinction of
... native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biological invasions. We used four years of demographic data and seed-removal experiments to ...
... native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biological invasions. We used four years of demographic data and seed-removal experiments to ...
Apparent competition with an invasive plant hastens the extinction of
... native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biological invasions. We used four years of demographic data and seed-removal experiments to ...
... native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biological invasions. We used four years of demographic data and seed-removal experiments to ...
Dispersal and persistence
... Apomictic (seeds from unfertilized ovules) Parthenogenesis (embryos from unfertilized eggs) ...
... Apomictic (seeds from unfertilized ovules) Parthenogenesis (embryos from unfertilized eggs) ...
`Pre-dispersal losses and dispersal of seeds in the Desert Biome
... thus still evolving towards a stable state (Fenner & Thompson, 2005). However, some relationships do seem to exist between animal size and seed size. Where ants are the primary dispersers, seeds need to be small and light enough to be carried by the ants. Where the seed is to pass through the digest ...
... thus still evolving towards a stable state (Fenner & Thompson, 2005). However, some relationships do seem to exist between animal size and seed size. Where ants are the primary dispersers, seeds need to be small and light enough to be carried by the ants. Where the seed is to pass through the digest ...
Journal of Tropical Ecology - CESCO
... Our results showed that seed dispersal proportion was greater in 2001 compared with 2010, the year of higher seed production, which is consistent with our initial hypothesis of frugivore satiation. However, there was a spatio-temporal effect in the pattern of satiation that relates to the community ...
... Our results showed that seed dispersal proportion was greater in 2001 compared with 2010, the year of higher seed production, which is consistent with our initial hypothesis of frugivore satiation. However, there was a spatio-temporal effect in the pattern of satiation that relates to the community ...
The Dodo and the Tambalacoque Tree: An Obligate Mutualism
... tambalacoque stones can withstand 4-5 times the force required to crush almonds (Temple 1977, Jackson et al. 1988). The fruit matures over an extended period (18 ...
... tambalacoque stones can withstand 4-5 times the force required to crush almonds (Temple 1977, Jackson et al. 1988). The fruit matures over an extended period (18 ...
Slide 1: NATURAL HISTORY of WHITE
... increases due to starvation and disease, reproductive rates drop, population decreases, habitat recovers, and the cycle is completed as the population increases again. In human-altered ecosystems, predators are nearly nonexistent and increases and decreases in populations are too abrupt. In huma ...
... increases due to starvation and disease, reproductive rates drop, population decreases, habitat recovers, and the cycle is completed as the population increases again. In human-altered ecosystems, predators are nearly nonexistent and increases and decreases in populations are too abrupt. In huma ...
reproductive ecology of an endemic plant, astragalus australis var
... counting the number of pedicel scars on each rachis. In 1988, five additional individuals were selected at random in each population and included in counts of total raceme, flower, and fruit production per plant. Loss of bags reduced harvest sample sizes to 18 plants at Blue Mountain and 24 at Hurri ...
... counting the number of pedicel scars on each rachis. In 1988, five additional individuals were selected at random in each population and included in counts of total raceme, flower, and fruit production per plant. Loss of bags reduced harvest sample sizes to 18 plants at Blue Mountain and 24 at Hurri ...
the Study of Mutualistic Benefits To Plants In Myrmecochory
... This being said, elaiosomes may serve as an important food source for a colony that may be comprised of a high density of larvae whose nutritional requirements consist of proteins and fats (Vinson 1968; Hölldobler and Wilson 1990). Elaiosomes could also potentially serve as a vital resource when ot ...
... This being said, elaiosomes may serve as an important food source for a colony that may be comprised of a high density of larvae whose nutritional requirements consist of proteins and fats (Vinson 1968; Hölldobler and Wilson 1990). Elaiosomes could also potentially serve as a vital resource when ot ...
Ant-mediated seed dispersal does not facilitate niche expansion
... myrmecochore propagules via ant dispersal potentially alleviates these negative effects. From this perspective, ant-mediated seed dispersal is less about exploiting resources in novel microhabitats than escaping density-dependent burdens in established microhabitats (Handel & Beattie 1990; Gorb & Go ...
... myrmecochore propagules via ant dispersal potentially alleviates these negative effects. From this perspective, ant-mediated seed dispersal is less about exploiting resources in novel microhabitats than escaping density-dependent burdens in established microhabitats (Handel & Beattie 1990; Gorb & Go ...
revised Sept 2015 - The Deer Initiative
... reduce in old age, referred to as the antlers “going back”. The final shape of normal adult antlers varies with species, age, condition and genetics. There may be traits in antler shape and style between ...
... reduce in old age, referred to as the antlers “going back”. The final shape of normal adult antlers varies with species, age, condition and genetics. There may be traits in antler shape and style between ...
Final Report - Rufford Small Grants
... availability to seedlings than the lower altitude. Through this experiment, was possible to verify a low performance of both populations at E. edulis in the lower altitude where the temperature is higher. Thus, this result suggest that with global warming, the persistence it will depend primary on t ...
... availability to seedlings than the lower altitude. Through this experiment, was possible to verify a low performance of both populations at E. edulis in the lower altitude where the temperature is higher. Thus, this result suggest that with global warming, the persistence it will depend primary on t ...
The impact of floral larceny on individuals, populations, and
... P<0.0001). In plants that were bird-pollinated, insect larcenists had a weak negative effect (d=–0.25) on female reproduction, while avian larcenists had a relatively strong negative effect (d=–1.07). For insect-pollinated plants, floral larceny by other insects had a weak positive effect (d=+0.23), ...
... P<0.0001). In plants that were bird-pollinated, insect larcenists had a weak negative effect (d=–0.25) on female reproduction, while avian larcenists had a relatively strong negative effect (d=–1.07). For insect-pollinated plants, floral larceny by other insects had a weak positive effect (d=+0.23), ...
redroot pigweed Amaranthus retroflexus L.
... small mammals commonly consume the seeds; seeds can survive ingestion and are dispersed in excrement (Costea et al. 2004). Potential to be spread by human activity: Seeds can be dispersed by farm machinery, livestock, and the spreading of manure (Costea et al. 2004). Redroot pigweed has been identif ...
... small mammals commonly consume the seeds; seeds can survive ingestion and are dispersed in excrement (Costea et al. 2004). Potential to be spread by human activity: Seeds can be dispersed by farm machinery, livestock, and the spreading of manure (Costea et al. 2004). Redroot pigweed has been identif ...
Effects of habitat isolation on pollinator communities and
... Here we tested the hypothesis that habitat fragmentation affects bee populations and thereby disrupts plant-pollinator interactions. We experimentally established small “habitat islands” of two self-incompatible, annual crucifers on eight calcareous grasslands and in the intensively managed agricult ...
... Here we tested the hypothesis that habitat fragmentation affects bee populations and thereby disrupts plant-pollinator interactions. We experimentally established small “habitat islands” of two self-incompatible, annual crucifers on eight calcareous grasslands and in the intensively managed agricult ...
Sexual Reproduction and Early Plant Growth of the Wollemi Pine
... viability may be the result of pollen limitation due, for example, to lack of thermal updraughts at crucial times in this remnant habitat in a deep narrow gorge. It may also be due to seasonal variations in pollen production. Further study may indicate other physical and biochemical restrictions. Em ...
... viability may be the result of pollen limitation due, for example, to lack of thermal updraughts at crucial times in this remnant habitat in a deep narrow gorge. It may also be due to seasonal variations in pollen production. Further study may indicate other physical and biochemical restrictions. Em ...
Deer Populations - Frostburg State University
... oak trees, but while testing, we saw many maple tree saplings, showing that in the next fifty to eighty years, we might expect a change in the over story at CMP and FMF, or lose it all together. In order for there to be a change in understory, white-tailed deer densities will need to be reduced. Th ...
... oak trees, but while testing, we saw many maple tree saplings, showing that in the next fifty to eighty years, we might expect a change in the over story at CMP and FMF, or lose it all together. In order for there to be a change in understory, white-tailed deer densities will need to be reduced. Th ...
Rare plants rediscovered in the Northern Cape
... The Bureau of Land Management is working with RBG Kew to collect seed from US native species that could be useful for restoration purposes. Currently 29% of the US flora is threatened, and native plant communities are at continuing risk from wild fires and invasion by introduced species. The project ...
... The Bureau of Land Management is working with RBG Kew to collect seed from US native species that could be useful for restoration purposes. Currently 29% of the US flora is threatened, and native plant communities are at continuing risk from wild fires and invasion by introduced species. The project ...
Chapter 5 Plant Growth and Development
... tree by its multiple stems and lower height, usually less than 5–6 m (15–20 ft) tall. Many shrubs can be trees or vice versa, depending on the particular growing conditions (Figure 5.3). ...
... tree by its multiple stems and lower height, usually less than 5–6 m (15–20 ft) tall. Many shrubs can be trees or vice versa, depending on the particular growing conditions (Figure 5.3). ...
only means for most plants to colonize new habitats or escape
... What would the natural world look like if we lost the frugivorous and granivorous animals that disperse seeds? Depending on the habitat type, the natural regeneration cycle and recruitment of a large fraction of plant species would be changed. Local extinctions might or might not follow, as many spe ...
... What would the natural world look like if we lost the frugivorous and granivorous animals that disperse seeds? Depending on the habitat type, the natural regeneration cycle and recruitment of a large fraction of plant species would be changed. Local extinctions might or might not follow, as many spe ...
![Chapter 1 [in PDF format] - Princeton University Press](http://s1.studyres.com/store/data/017020050_1-3639093182e45557b3b09d843fd09568-300x300.png)
Reproductive Ecology of Flowering Plants: A Manual
... Erosion of biological diversity is one of the most challenging issues of our times. Although overexploitation, habitat destruction and climate change are the proximate causes for erosion of biological diversity, the ultimate driving force for pushing any species to endangered category is its inabili ...
... Erosion of biological diversity is one of the most challenging issues of our times. Although overexploitation, habitat destruction and climate change are the proximate causes for erosion of biological diversity, the ultimate driving force for pushing any species to endangered category is its inabili ...
Trillium grandiflorum
Trillium grandiflorum (common names white trillium, large-flowered trillium, great white trillium, white wake-robin, French trille blanc) is a species of flowering plant in the family Melanthiaceae. A monocotyledonous, herbaceous perennial, it is native to eastern North America, from northern Quebec to the southern parts of the United States through the Appalachian Mountains into northernmost Georgia and west to Minnesota. It also thrives on Vancouver Island in British Columbia. There are also several isolated populations, such as in Nova Scotia and Iowa.Trillium grandiflorum is most common in rich, mixed upland forests. It is easily recognised by its attractive three-petaled white flowers, opening from late spring to early summer, that rise above a whorl of three, leaf-like bracts. It is an example of a spring ephemeral, a plant whose life-cycle is synchronised with that of the deciduous woodland which it favours.