Seed predation by ants in south-eastern Spain (Desierto de
... Among the eight species of harvester ants occuring in the Tabernas Desert, six feed mainly or exclusively on seeds. The three Messor species are the most important as predators because the amount of seeds collected by them is by far larger than that brought in by the other species. However, also sma ...
... Among the eight species of harvester ants occuring in the Tabernas Desert, six feed mainly or exclusively on seeds. The three Messor species are the most important as predators because the amount of seeds collected by them is by far larger than that brought in by the other species. However, also sma ...
Altitudinal gradients of generalist and specialist herbivory on three
... In Petasites albus, the leaf area loss decreased significantly with increasing altitude (Fig. 1). All stands whose mean losses of the 10 most severely damaged leaves were higher than 10% were located at altitudes lower than 500 m. Up to 440 m, no stand exhibited less than 4% damage. In contrast, the ...
... In Petasites albus, the leaf area loss decreased significantly with increasing altitude (Fig. 1). All stands whose mean losses of the 10 most severely damaged leaves were higher than 10% were located at altitudes lower than 500 m. Up to 440 m, no stand exhibited less than 4% damage. In contrast, the ...
aggregated seed arrival alters plant diversity in
... seed arrival differed between uniform and aggregated treatments while seed density was held constant at the plot scale. Seed mass was used as a surrogate for seed number based on developed seed mass–seed number relationships for each species. To mimic natural seed arrival, seeds were hand scattered ...
... seed arrival differed between uniform and aggregated treatments while seed density was held constant at the plot scale. Seed mass was used as a surrogate for seed number based on developed seed mass–seed number relationships for each species. To mimic natural seed arrival, seeds were hand scattered ...
Growing Valley Oak
... roots of particular species reach the botof the pot, they are air pruned--that is, Approximately 11 percent of the seeds had toms of containers. Our data show that they are killed by exposure to dessicating multiple longitudinal cracks at their distal even in relatively deep pots (16 inches), air--a ...
... roots of particular species reach the botof the pot, they are air pruned--that is, Approximately 11 percent of the seeds had toms of containers. Our data show that they are killed by exposure to dessicating multiple longitudinal cracks at their distal even in relatively deep pots (16 inches), air--a ...
Download Frugivory by introduced black rats (Rattus rattus) promotes dispersal of invasive plant seeds
... Islands for at least the previous 5 years. I chose 25 plant species based on the highest frequencies listed with the following two constraints: First, to maximize phylogenetic diversity, no more than two species per family and one species per genus was selected. Second, at least three experts had to ...
... Islands for at least the previous 5 years. I chose 25 plant species based on the highest frequencies listed with the following two constraints: First, to maximize phylogenetic diversity, no more than two species per family and one species per genus was selected. Second, at least three experts had to ...
Conservation genetics of two co-dominant grass
... prairie area remaining in Illinois (Robertson 2001). Seeds of both species were collected from each site because seeds are what restoration ecologists /conservation biologists use to establish or augment populations (Diboll 1997). Only sites from which we obtained germinable seed from more than 10 i ...
... prairie area remaining in Illinois (Robertson 2001). Seeds of both species were collected from each site because seeds are what restoration ecologists /conservation biologists use to establish or augment populations (Diboll 1997). Only sites from which we obtained germinable seed from more than 10 i ...
The distance dependence prediction of the Janzen
... allow for quantification of bias if it exists. The distance aspect of the Janzen-Connell hypothesis is very amenable to testing through meta-analysis for several reasons. There are a large number of experiments in the literature addressing whether distance enhances propagule survival using a wide va ...
... allow for quantification of bias if it exists. The distance aspect of the Janzen-Connell hypothesis is very amenable to testing through meta-analysis for several reasons. There are a large number of experiments in the literature addressing whether distance enhances propagule survival using a wide va ...
Morphology and Dispersal of One- and Two
... rainstorm dispersed most of the painted diaspores on five plants. The marked diaspores were recovered the following day in order to minimize their exposure to seed predators. Secondary as well as primary dispersal was expected to have occurred because diaspores seem to be blown about until they lodg ...
... rainstorm dispersed most of the painted diaspores on five plants. The marked diaspores were recovered the following day in order to minimize their exposure to seed predators. Secondary as well as primary dispersal was expected to have occurred because diaspores seem to be blown about until they lodg ...
Ant-mediated seed dispersal does not facilitate niche expansion
... 3. We test these assumptions by introducing Hexastylis arifolia seeds in cafeteria-style bait stations along abiotic gradients (moisture, temperature, light) for removal by key seed dispersers from the ant genus Aphaenogaster. We also examine plant aggregation along the same gradients. 4. Ant-mediat ...
... 3. We test these assumptions by introducing Hexastylis arifolia seeds in cafeteria-style bait stations along abiotic gradients (moisture, temperature, light) for removal by key seed dispersers from the ant genus Aphaenogaster. We also examine plant aggregation along the same gradients. 4. Ant-mediat ...
OIKOS 55: 375—386 - digital
... A total of 20 individually marked female plants were studied, with intensive observations on fruiting phenology and fruit removal on 12 of these. An additional sample of 12 plants was added for data on fruit crop sizes and seed viability (see below). Weekly counts of fruits at marked branches were u ...
... A total of 20 individually marked female plants were studied, with intensive observations on fruiting phenology and fruit removal on 12 of these. An additional sample of 12 plants was added for data on fruit crop sizes and seed viability (see below). Weekly counts of fruits at marked branches were u ...
(Primulaceae), a Wild
... Lysimachia minoricensis is one of the few Mediterranean endemic plants (Minorca, Balearic islands) that has gone extinct in the wild but which persists as extant germplasm or cultivated plants in several botanical gardens. Reproductive features (seed set, number of seeds per capsule, seed weight) an ...
... Lysimachia minoricensis is one of the few Mediterranean endemic plants (Minorca, Balearic islands) that has gone extinct in the wild but which persists as extant germplasm or cultivated plants in several botanical gardens. Reproductive features (seed set, number of seeds per capsule, seed weight) an ...
Tesis Maestria en Ciencias de Marcos A. Caraballo Ortiz
... population particularly relevant because factors such as flower timing, spatial isolation, and/or neighborhoods could severely reduce pollination and fruit set (Feinsinger et al. 1991, Kunin 1993). This can be especially critical for rare and endangered species (Demauro 1993, Kunin 1993, Byers 1995) ...
... population particularly relevant because factors such as flower timing, spatial isolation, and/or neighborhoods could severely reduce pollination and fruit set (Feinsinger et al. 1991, Kunin 1993). This can be especially critical for rare and endangered species (Demauro 1993, Kunin 1993, Byers 1995) ...
Select your Weed Species
... potential yield is based on: -Average Season – the wizard will assume an average potential yield -Provided Potential Yield – enter a potential yield, for example the average district yield. This may be modified to account for your soil type or the season. -% Average Season – this will scale the aver ...
... potential yield is based on: -Average Season – the wizard will assume an average potential yield -Provided Potential Yield – enter a potential yield, for example the average district yield. This may be modified to account for your soil type or the season. -% Average Season – this will scale the aver ...
Convergence in Morphological Patterns and Community
... the rules that govern them, in fact, to determine whether such rules exist at all (cf. Lawton 1999), and, if they do, to assess their generality. The occurrence of convergent community structure would strongly indicate general governing rules. If similar selection regimes produce similarly structure ...
... the rules that govern them, in fact, to determine whether such rules exist at all (cf. Lawton 1999), and, if they do, to assess their generality. The occurrence of convergent community structure would strongly indicate general governing rules. If similar selection regimes produce similarly structure ...
Niche Expansion and Contraction in a Variable Environment1
... of seed densities in the soil. Table 3 lists FIG. 2. The geographic wintering range of Chipping the common seed species identified in the Sparrows expands during years of low seed produc- diet samples. The list accounts for approxtion. Seed production in the fall of 1974-75 at The imately 95% of the ...
... of seed densities in the soil. Table 3 lists FIG. 2. The geographic wintering range of Chipping the common seed species identified in the Sparrows expands during years of low seed produc- diet samples. The list accounts for approxtion. Seed production in the fall of 1974-75 at The imately 95% of the ...
2011rat2
... ubiquitous and problematic species introduced to islands; more than 80% of the world’s island groups have been invaded. Introduced rats (black rat, Rattus rattus; Norway rat, R. norvegicus; Pacific rat, R. exulans) are well known as seed predators but are often overlooked as potential seed disperser ...
... ubiquitous and problematic species introduced to islands; more than 80% of the world’s island groups have been invaded. Introduced rats (black rat, Rattus rattus; Norway rat, R. norvegicus; Pacific rat, R. exulans) are well known as seed predators but are often overlooked as potential seed disperser ...
Seed Germination and Seedling Survival of two endemic (Eryngium
... the disturbed scrub. For all species with germination, the number of germinants increased with planted seed density (Figure 15). Background germination We observed germination of seeds from each study species in the growth chamber (3/25/2010 – 7/21/2010) as a reference point for maximum potential ge ...
... the disturbed scrub. For all species with germination, the number of germinants increased with planted seed density (Figure 15). Background germination We observed germination of seeds from each study species in the growth chamber (3/25/2010 – 7/21/2010) as a reference point for maximum potential ge ...
A related threat is how climate change will influence the
... 3). Create populations with the potential for sexual reproduction by intermixing seedling clones with parent clones As UC Botanic Garden and the Presidio Nursery produces clones from the selfed seedlings, one practical objective for management should to create multiple populations within the Presidi ...
... 3). Create populations with the potential for sexual reproduction by intermixing seedling clones with parent clones As UC Botanic Garden and the Presidio Nursery produces clones from the selfed seedlings, one practical objective for management should to create multiple populations within the Presidi ...
Competition strength of two significant invasive
... alone and with either of the natives. Similarly, in experiments investigating how competition varied with water limitation, bitou bush was highly resilient to neighbouring plants (Mason et al. 2012). Only six of 18 different native species had an effect on the growth of bitou bush marginally and o ...
... alone and with either of the natives. Similarly, in experiments investigating how competition varied with water limitation, bitou bush was highly resilient to neighbouring plants (Mason et al. 2012). Only six of 18 different native species had an effect on the growth of bitou bush marginally and o ...
Contingent fire effects on granivore removal of exotic woody plant
... chosen by arthropods due to weight and size limitations on movement (Rey et al. 2002), whereas large seeds are more likely to be consumed by small mammals (Brown and Heske 1990; Matias et al. 2009). Seed selection may also depend on how habitat structure changes with time since fire because seed pre ...
... chosen by arthropods due to weight and size limitations on movement (Rey et al. 2002), whereas large seeds are more likely to be consumed by small mammals (Brown and Heske 1990; Matias et al. 2009). Seed selection may also depend on how habitat structure changes with time since fire because seed pre ...
A Field Experiment Demonstrating Plant Life
... herbivory by mesh fencing. At this highly productive site, initially with little plant competition, genotypes were up to twice as fecund as they were when planted at alternative sites in Tompkins County (A. A. Agrawal, unpublished data). In the center of each plot, we established a 1 # 1m focal area ...
... herbivory by mesh fencing. At this highly productive site, initially with little plant competition, genotypes were up to twice as fecund as they were when planted at alternative sites in Tompkins County (A. A. Agrawal, unpublished data). In the center of each plot, we established a 1 # 1m focal area ...
The role of past and present management in the rural landscape
... was used as a basis for a permutation test comparing seed bank, seed rain and above-ground vegetation communities at the site level, as well as for assessing the similarity of the seed bank and seed rain with above-ground vegetation between habitat types. Characteristic species of seminatural grassl ...
... was used as a basis for a permutation test comparing seed bank, seed rain and above-ground vegetation communities at the site level, as well as for assessing the similarity of the seed bank and seed rain with above-ground vegetation between habitat types. Characteristic species of seminatural grassl ...
Property Management Plan (RTP) Evan Hall
... for control of these two species such as shooting, trapping and baiting, and it is recommended that control of these species is undertaken simultaneously; as it is believed cats may increase in number if control of foxes is undertaken (research into this is currently being undertaken by DPAW). If yo ...
... for control of these two species such as shooting, trapping and baiting, and it is recommended that control of these species is undertaken simultaneously; as it is believed cats may increase in number if control of foxes is undertaken (research into this is currently being undertaken by DPAW). If yo ...
Yates CV - July 2016 - Chicago Botanic Garden
... endemic plant species in support of a sensitive species management plan for the Spring Mountains National Recreation Area in southern Nevada within the Humbolt-Toiyabe National Forest. Collected and cleaned native and rare plant seed for future ecological restoration projects and storage in seed ban ...
... endemic plant species in support of a sensitive species management plan for the Spring Mountains National Recreation Area in southern Nevada within the Humbolt-Toiyabe National Forest. Collected and cleaned native and rare plant seed for future ecological restoration projects and storage in seed ban ...
Giving-up densities of foraging gerbils: the effect of interspecific
... dealt with studies on the foraging behavior of the species on manipulated seed patches in different situations (e.g., different habitat types) in open grids. While the first revealed the interference competition by G. pyramidum (above), the second revealed the ability of G. a. allenbyi to forage seed l ...
... dealt with studies on the foraging behavior of the species on manipulated seed patches in different situations (e.g., different habitat types) in open grids. While the first revealed the interference competition by G. pyramidum (above), the second revealed the ability of G. a. allenbyi to forage seed l ...
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.