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 ...
The effect of seed size on seed fate in a subtropical
... Scatter-hoarding rodents acting both as seed predators and dispersers usually play an important role in seed dispersal of many plant species. Seed size is thought to essentially affect rodent scatter-hoarding processes. However, studies to date have frequently shown many controversial results regard ...
... Scatter-hoarding rodents acting both as seed predators and dispersers usually play an important role in seed dispersal of many plant species. Seed size is thought to essentially affect rodent scatter-hoarding processes. However, studies to date have frequently shown many controversial results regard ...
An Introduction to Wetland Seed Banks
... soil samples are extracted and brought back to a greenhouse or lab to be observed under conditions favorable for germination. Under this method, germinating species are removed from the soil as they are identified, and the treatment continues until all seedlings have emerged from the soil. In a revi ...
... soil samples are extracted and brought back to a greenhouse or lab to be observed under conditions favorable for germination. Under this method, germinating species are removed from the soil as they are identified, and the treatment continues until all seedlings have emerged from the soil. In a revi ...
Animals as Seed Dispersers
... Ridley (1930) recounts examples of the viscid fruits of the genus Pisonia, found in tropical regions worldwide. For one extreme example with Pisonia aculeata from Uganda, C.B. Ussher found ‘a bird lying helpless on the ground covered with the fruit of this creeper. Its feathers were all stuck togeth ...
... Ridley (1930) recounts examples of the viscid fruits of the genus Pisonia, found in tropical regions worldwide. For one extreme example with Pisonia aculeata from Uganda, C.B. Ussher found ‘a bird lying helpless on the ground covered with the fruit of this creeper. Its feathers were all stuck togeth ...
Niche Expansion and Contraction in a Variable Environment1
... in March than in January. Since the seeds of the unarmoured seed species tended to be positively associated in the soil samples, I also looked at the frequency distribution of unarmoured seeds of all types combined in the soil samples. In January, 6 of 28 soil samples contained more than 150 unarmou ...
... in March than in January. Since the seeds of the unarmoured seed species tended to be positively associated in the soil samples, I also looked at the frequency distribution of unarmoured seeds of all types combined in the soil samples. In January, 6 of 28 soil samples contained more than 150 unarmou ...
Argentum luminaria in the Past
... For the past 10 years we have collected seeds from each of the three populations of Argentum luminaria (A, B, C) for the purpose of gathering data on the variation of each of three traits: 1. # of seed coat spines 2. length and width of seed coat spines 3. thickness of the seed coat. The three popul ...
... For the past 10 years we have collected seeds from each of the three populations of Argentum luminaria (A, B, C) for the purpose of gathering data on the variation of each of three traits: 1. # of seed coat spines 2. length and width of seed coat spines 3. thickness of the seed coat. The three popul ...
Mammal and insect predation of chemically and structurally
... Previous studies have focused only on the function of M. holtonii chemical defences against seed predators (Rehr et al. 1973). However, little is known about the potential role of seed structures, such as the seed coat, that may act as physical deterrents to seed predation (Janzen 1977a). It is poss ...
... Previous studies have focused only on the function of M. holtonii chemical defences against seed predators (Rehr et al. 1973). However, little is known about the potential role of seed structures, such as the seed coat, that may act as physical deterrents to seed predation (Janzen 1977a). It is poss ...
Timing and success of reproductive stages in the seagrass Zostera
... The timing and success of sexual reproduction of the seagrass Zostera noltii was investigated at the Ria Formosa lagoon, Portugal. Thirty plants were tagged and monitored individually through time to determine in situ the development time of each maturation stage, from the emergence of the flowers t ...
... The timing and success of sexual reproduction of the seagrass Zostera noltii was investigated at the Ria Formosa lagoon, Portugal. Thirty plants were tagged and monitored individually through time to determine in situ the development time of each maturation stage, from the emergence of the flowers t ...
Using seed recovery methods to determine causes of failed
... plant, animal, and human communities. Some of these benefits include carbon sequestration, erosion control, and increased habitat for wildlife (Smith 2010). Prior to Euro-American settlement, a large portion of the Midwest and most of Iowa was covered with native prairie. However, by 1900 over 90% h ...
... plant, animal, and human communities. Some of these benefits include carbon sequestration, erosion control, and increased habitat for wildlife (Smith 2010). Prior to Euro-American settlement, a large portion of the Midwest and most of Iowa was covered with native prairie. However, by 1900 over 90% h ...
univERsity oF copEnhAGEn
... can be applied to the material used for pelleting. Pelleting is also used to make seeds uniform size which eases, for example, mechanical sowing. Sowing of very small unpelleted seed is easier if they are mixed and sown together with some seed-like material, e.g. sand or cut rice grains. 6. Sowing d ...
... can be applied to the material used for pelleting. Pelleting is also used to make seeds uniform size which eases, for example, mechanical sowing. Sowing of very small unpelleted seed is easier if they are mixed and sown together with some seed-like material, e.g. sand or cut rice grains. 6. Sowing d ...
Fremontodendron californicum
... (elaiosomes removed) in caged and uncaged locations under shrubs • After 9 months extract and count surviving seeds ...
... (elaiosomes removed) in caged and uncaged locations under shrubs • After 9 months extract and count surviving seeds ...
Sexual Reproduction and Early Plant Growth of the Wollemi Pine
... with wind dispersed pollen, and suggests that low seed 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 i ...
... with wind dispersed pollen, and suggests that low seed 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 i ...
XPS DTDv4.0 BIO2
... in December, using exclosures to protect half of them from herbivores. When they were protected inside exclosures, there was no difference between ingested and non-ingested seeds in the number of plants that survived until June-July. However, fewer plants survived from ingested seeds when exposed to ...
... in December, using exclosures to protect half of them from herbivores. When they were protected inside exclosures, there was no difference between ingested and non-ingested seeds in the number of plants that survived until June-July. However, fewer plants survived from ingested seeds when exposed to ...
Journal of Tropical Ecology - CESCO
... between habitat and year (Table 1). According to our two diversity indices, GP showed the highest values of diversity for primate-preferred species compared with PP in both years (Figure 1): 2001 (H’ = 1.66; 1-D = 0.67 for GP vs. H’ = 1.28, 1-D = 0.55 for PP) and 2010 (H’= 2.04; 1-D= 0.76 for GP vs. ...
... between habitat and year (Table 1). According to our two diversity indices, GP showed the highest values of diversity for primate-preferred species compared with PP in both years (Figure 1): 2001 (H’ = 1.66; 1-D = 0.67 for GP vs. H’ = 1.28, 1-D = 0.55 for PP) and 2010 (H’= 2.04; 1-D= 0.76 for GP vs. ...
Seed Storage - University of Georgia
... the random sources of pollen. Native species tend to be more stable, but also have variation between generations. To get a clone, try vegetative propagation! ...
... the random sources of pollen. Native species tend to be more stable, but also have variation between generations. To get a clone, try vegetative propagation! ...
Seed Storage Guidelines PDF
... The oldest seed collections from the Garden are currently at the National Center for Genetic Resource Preservation as part of the Fritz Went and Philip Munz long term seed longevity experiment.14 Seeds of more than 100 different native species from a wide range of families and habitats were supplied ...
... The oldest seed collections from the Garden are currently at the National Center for Genetic Resource Preservation as part of the Fritz Went and Philip Munz long term seed longevity experiment.14 Seeds of more than 100 different native species from a wide range of families and habitats were supplied ...
Seed Dispersal by Brown Bears, Ursus arctos, in Southeastern Alaska
... approximately 37 000 Vaccinium, 14 500 Ribes, 7600 Rubus, 2000 Oplopanax, 1900 Sambucus, and 400 Streptopus. In addition to those represented in Table 2, other kinds of seeds appeared in the scats sporadically (from fleshy fruits, Viburnum, Maianthemum; nonfleshy fruits, Kalmia, Heracleum, Carex, gr ...
... approximately 37 000 Vaccinium, 14 500 Ribes, 7600 Rubus, 2000 Oplopanax, 1900 Sambucus, and 400 Streptopus. In addition to those represented in Table 2, other kinds of seeds appeared in the scats sporadically (from fleshy fruits, Viburnum, Maianthemum; nonfleshy fruits, Kalmia, Heracleum, Carex, gr ...
Final Report - Rufford Small Grants
... In the seed addition experiments at different times in the two populations of E. edulis located in different altitudes, we observed that at higher elevation the time of seed dispersal not affected the seedling establishment of E. edulis. The seedling emergence and seedling survival were similar acro ...
... In the seed addition experiments at different times in the two populations of E. edulis located in different altitudes, we observed that at higher elevation the time of seed dispersal not affected the seedling establishment of E. edulis. The seedling emergence and seedling survival were similar acro ...
Seed eaters on our fields
... Many seeds of oilseed rape (Brassica napus L.) are lost during harvesting and can survive for a long time in soil. This can lead to problems with oilseed rape volunteers in following crops. However, seed predation could contribute to the reduction of oilseed rape volunteers. A field trial was conduc ...
... Many seeds of oilseed rape (Brassica napus L.) are lost during harvesting and can survive for a long time in soil. This can lead to problems with oilseed rape volunteers in following crops. However, seed predation could contribute to the reduction of oilseed rape volunteers. A field trial was conduc ...
Weed seed predation in semi-arid winter cereals
... weed species such as Capsella bursa-pastoris, Diplotaxis erucoides, Bromus diandrus, Papaver rhoeas, Galium spurium, Lolium rigidum and Avena sterilis but overlapped with the period of maximum predation. Because of the overlap between seed shed and high activity of predators we expected that seed lo ...
... weed species such as Capsella bursa-pastoris, Diplotaxis erucoides, Bromus diandrus, Papaver rhoeas, Galium spurium, Lolium rigidum and Avena sterilis but overlapped with the period of maximum predation. Because of the overlap between seed shed and high activity of predators we expected that seed lo ...
Allele Frequency Lab: Variation in a Pumpkin Species
... Essential Questions: What is the role of natural selection in speciation? ...
... Essential Questions: What is the role of natural selection in speciation? ...
2005 Accomplishments Evaluation of Native Forb and Grass Seed for Areas
... survival, early growth, and microsite conditions. In fall, seeds of 10 forb and 5 grass species selected for further evaluation were again collected, cleaned, tested, and sown at Lucky Peak nursery to examine effectiveness of grow-out and seed production in 2006. The project results will be presente ...
... survival, early growth, and microsite conditions. In fall, seeds of 10 forb and 5 grass species selected for further evaluation were again collected, cleaned, tested, and sown at Lucky Peak nursery to examine effectiveness of grow-out and seed production in 2006. The project results will be presente ...
Selection in Populations Post lab Extension This graph shows the
... finch, the medium ground finch, Geospiza fortis, during a drought period. ...
... finch, the medium ground finch, Geospiza fortis, during a drought period. ...
Poppy seed
Poppy seed is an oilseed obtained from the opium poppy (Papaver somniferum). The tiny kidney-shaped seeds have been harvested from dried seed pods by various civilizations for thousands of years. The seeds are used, whole or ground, as an ingredient in many foods, and they are pressed to yield poppyseed oil.