The impact of herbicides on weed abundance and biodiversity PN0940
... We also thank colleagues in our own institutions for their input, without whom this document would not have been as wide-ranging as it is. This report has been achieved in just over four months. While there is undoubtedly scope for further work and there are a number of gaps within the report, it pr ...
... We also thank colleagues in our own institutions for their input, without whom this document would not have been as wide-ranging as it is. This report has been achieved in just over four months. While there is undoubtedly scope for further work and there are a number of gaps within the report, it pr ...
(Apios americana Medicus) in Colorado
... management suggestions based on the available data. The known occurrences do not appear to have declined in recent years, and all supported robust, healthy plants in the summer of 2000. Flowering occurred at all of the occurrences in 2000 despite drought conditions, and three of the five known occur ...
... management suggestions based on the available data. The known occurrences do not appear to have declined in recent years, and all supported robust, healthy plants in the summer of 2000. Flowering occurred at all of the occurrences in 2000 despite drought conditions, and three of the five known occur ...
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 ...
Who Resembles Whom? Mimetic and Coincidental Look
... coloration of model/mimic pairs likely appear more similar to reef fishes than do coloration of non-mimetic pairs. Two of the mimetic pairs tested in that study included adults of A. taeniatus and L. dimidiatus, and juveniles of each. Many fish species of greatly varying sizes and trophic and taxono ...
... coloration of model/mimic pairs likely appear more similar to reef fishes than do coloration of non-mimetic pairs. Two of the mimetic pairs tested in that study included adults of A. taeniatus and L. dimidiatus, and juveniles of each. Many fish species of greatly varying sizes and trophic and taxono ...
The evolution and functional morphology of trap-jaw
... has, by far, the most species of trap-jaw ants, all currently classified as members of the tribe Dacetini (which includes over 900 described species) (BOLTON 2013). Although not all dacetine species are trap-jaw ants, a large portion of the genus Strumigenys and all members of the genera Acanthognat ...
... has, by far, the most species of trap-jaw ants, all currently classified as members of the tribe Dacetini (which includes over 900 described species) (BOLTON 2013). Although not all dacetine species are trap-jaw ants, a large portion of the genus Strumigenys and all members of the genera Acanthognat ...
Interactions among mutualism, competition, and predation foster
... high plant density (Silvertown 1980). Furthermore, it introduces the notion that natural enemy behavior might not be influenced by very low plant density (Real 1977; Krebs 1974; Jeschke et al. 2002). In a diverse community, very rare plant species might escape predation because natural enemies might ...
... high plant density (Silvertown 1980). Furthermore, it introduces the notion that natural enemy behavior might not be influenced by very low plant density (Real 1977; Krebs 1974; Jeschke et al. 2002). In a diverse community, very rare plant species might escape predation because natural enemies might ...
Sneaky African fig wasps that oviposit through holes drilled by other
... consequently greater safety from ants, may have been an ...
... consequently greater safety from ants, may have been an ...
15. Macroalgae - Coral Reef Algae Lab
... Caulerpa, Chlorodesmis, Halimeda, and the reds Laurencia, Galaxaura and Liagora are common in offshore reefs but in low abundance. Crustose calcareous algae are abundant and diverse on offshore reefs and play significant roles in reef construction. Common taxa on offshore reefs include the CCA Porol ...
... Caulerpa, Chlorodesmis, Halimeda, and the reds Laurencia, Galaxaura and Liagora are common in offshore reefs but in low abundance. Crustose calcareous algae are abundant and diverse on offshore reefs and play significant roles in reef construction. Common taxa on offshore reefs include the CCA Porol ...
Stoichiometry of actual vs. potential predator–prey interactions
... between pairs of terrestrial arthropod species. We recognize that many of the potential interactions would never occur by virtue of mismatched spatial distributions, feeding styles, body plans, and other factors, and instead manipulate the database only to get a sense of how interspecific variabilit ...
... between pairs of terrestrial arthropod species. We recognize that many of the potential interactions would never occur by virtue of mismatched spatial distributions, feeding styles, body plans, and other factors, and instead manipulate the database only to get a sense of how interspecific variabilit ...
Background - Sacramento - California State University
... accurately assessed is satisfied. Additionally, each patch may be linked by the dispersal of multiple interacting species. As for Leibold’s second requirement, it is assumed that different insect species will respond to processes at different spatial scales. This system was therefore appropriate for ...
... accurately assessed is satisfied. Additionally, each patch may be linked by the dispersal of multiple interacting species. As for Leibold’s second requirement, it is assumed that different insect species will respond to processes at different spatial scales. This system was therefore appropriate for ...
Tropical tadpole assemblages: which factors affect their structure
... richness may present different species composition (e.g. high ß-diversity) (Parris & MacCarthy 1999). Pond habitats are relatively well known and differ from streams mainly to their unpredictability. Characteristics as water temperature, depth, dissolved oxygen, conductivity and presence of vegetati ...
... richness may present different species composition (e.g. high ß-diversity) (Parris & MacCarthy 1999). Pond habitats are relatively well known and differ from streams mainly to their unpredictability. Characteristics as water temperature, depth, dissolved oxygen, conductivity and presence of vegetati ...
Cornulitid tubeworms from the Ordovician of eastern Baltic Olev V
... There is just one species of cornulitid, C. semiapertus, known from the Middle Ordovician of Estonia (Fig. 2). In the Late Ordovician of Estonia the number increases to two genera with nine species (Fig. 2). There is one species in the Darriwilian, three in the Sandbian and six in the Katian. These ...
... There is just one species of cornulitid, C. semiapertus, known from the Middle Ordovician of Estonia (Fig. 2). In the Late Ordovician of Estonia the number increases to two genera with nine species (Fig. 2). There is one species in the Darriwilian, three in the Sandbian and six in the Katian. These ...
Evaluating MPA effectiveness
... authors have ventured appraisals of how these effects enable MPA’s to achieve their intended objectives (but see Rowley 1994, Freitas et al. 1998). There is increasing pressure for evaluation of MPA’s with respect to their intended objectives (Carr and Raimondi 1999, Murray et al. 1999). This has im ...
... authors have ventured appraisals of how these effects enable MPA’s to achieve their intended objectives (but see Rowley 1994, Freitas et al. 1998). There is increasing pressure for evaluation of MPA’s with respect to their intended objectives (Carr and Raimondi 1999, Murray et al. 1999). This has im ...
Southern bell frog - draft recovery plan
... The Southern Bell Frog (Litoria raniformis) has suffered a considerable reduction in abundance and distribution throughout New South Wales in recent years (Tyler 1993, Sadlier and Pressey 1994, Mahony 1996, Osborne et al. 1996, Ehmann and White 1996). Once abundant along the Murray and Murrumbidgee ...
... The Southern Bell Frog (Litoria raniformis) has suffered a considerable reduction in abundance and distribution throughout New South Wales in recent years (Tyler 1993, Sadlier and Pressey 1994, Mahony 1996, Osborne et al. 1996, Ehmann and White 1996). Once abundant along the Murray and Murrumbidgee ...
An overview of studies on trophic ecology in the
... (2004) used these signatures to identify similarities and discrepancies between taxonomic groups and ecosystems. Trophic signatures are similar for ecosystems previously known to share major features, and different for dissimilar ecosystems. Trophic signatures may be useful tools for better understa ...
... (2004) used these signatures to identify similarities and discrepancies between taxonomic groups and ecosystems. Trophic signatures are similar for ecosystems previously known to share major features, and different for dissimilar ecosystems. Trophic signatures may be useful tools for better understa ...
Fruitful factors: what limits seed production of flowering plants in the
... markedly in flowering time, sexual compatibility, and floral display (Online Resource 2; Pojar 1974). All nine species were included in pollen-manipulation experiments, but Valeriana and Sorbus failed to produce seeds in 2011, preventing analysis. We report on the seven remaining species, though Ane ...
... markedly in flowering time, sexual compatibility, and floral display (Online Resource 2; Pojar 1974). All nine species were included in pollen-manipulation experiments, but Valeriana and Sorbus failed to produce seeds in 2011, preventing analysis. We report on the seven remaining species, though Ane ...
Interactions among mycorrhizae, atmospheric CO R E P O R T
... 3 weeks of transplantation were replanted. After that time, dead plants were not replaced. After 16 weeks, plant roots were collected from each mesocosm and checked for AM colonization. The +AM mesocosms had an average of 35% root length colonized and the )AM mesocosms had no colonization. There was ...
... 3 weeks of transplantation were replanted. After that time, dead plants were not replaced. After 16 weeks, plant roots were collected from each mesocosm and checked for AM colonization. The +AM mesocosms had an average of 35% root length colonized and the )AM mesocosms had no colonization. There was ...
Responses of Tropical Bats to Habitat Fragmentation, Logging, and
... 4.1 Habitat Conversion: A Key Aspect of Global Change Bats are valuable indicators of biodiversity and ecosystem health, and respond to a range of stressors related to environmental change (Jones et al. 2009). Alteration in land use is one of the principal aspects of global environmental change and ...
... 4.1 Habitat Conversion: A Key Aspect of Global Change Bats are valuable indicators of biodiversity and ecosystem health, and respond to a range of stressors related to environmental change (Jones et al. 2009). Alteration in land use is one of the principal aspects of global environmental change and ...
Exemplar for Internal Achievement Standard Biology Level 2
... surface area, and carry out gas exchange by removing oxygen that has been dissolved from the air. They have two similar shells hinged together by a strong ligament that allows them to seal themselves and the water inside the shells. The gills do two jobs – take in oxygen and filter out fine food par ...
... surface area, and carry out gas exchange by removing oxygen that has been dissolved from the air. They have two similar shells hinged together by a strong ligament that allows them to seal themselves and the water inside the shells. The gills do two jobs – take in oxygen and filter out fine food par ...
Natural and human-induced dynamics in plant–animal mutualistic
... plants, pollinators and seed dispersers follow similar ecological principles and are structured in the same way, they are particularly well suited for comparative studies of plant–animal mutualistic interactions (Bascompte & Jordano 2007). Regarding the mutual benefits of plant–animal interactions o ...
... plants, pollinators and seed dispersers follow similar ecological principles and are structured in the same way, they are particularly well suited for comparative studies of plant–animal mutualistic interactions (Bascompte & Jordano 2007). Regarding the mutual benefits of plant–animal interactions o ...
- Wiley Online Library
... Classification of mechanisms producing TIMs, and some general principles of TIM interaction The following sections review several commonly discussed types of TIMs, generated via different mechanisms. Each suggests that the net modification of a given link is often contributed to by several similar mod ...
... Classification of mechanisms producing TIMs, and some general principles of TIM interaction The following sections review several commonly discussed types of TIMs, generated via different mechanisms. Each suggests that the net modification of a given link is often contributed to by several similar mod ...
Proceedings of THE CEDAR SYMPOSIUM
... It was Terry Lewis who first brought up the subject of deer browsing and how severe it was where he was working on Lyell and Burnaby Islands, in South Moresby. We all concurred that it looked pretty bad. That’s when things started to click. We discussed what we had seen, what the apparent impacts we ...
... It was Terry Lewis who first brought up the subject of deer browsing and how severe it was where he was working on Lyell and Burnaby Islands, in South Moresby. We all concurred that it looked pretty bad. That’s when things started to click. We discussed what we had seen, what the apparent impacts we ...
Rate of recovery of lichen-dominated tundra vegetation after
... KHITUN, O. (1997): Self-recovery after technogenic and natural disturbances in the central part of the Yamal Peninsula (Western Siberian Arctic). In: R.M.M. Crawford (ed.): Disturbance and recovery in Arctic lands: an ecological perspective. Kluwer Academic, Dordrecht, pp. 531-562. KRYAZHIMSKII, F. ...
... KHITUN, O. (1997): Self-recovery after technogenic and natural disturbances in the central part of the Yamal Peninsula (Western Siberian Arctic). In: R.M.M. Crawford (ed.): Disturbance and recovery in Arctic lands: an ecological perspective. Kluwer Academic, Dordrecht, pp. 531-562. KRYAZHIMSKII, F. ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.