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August 24th, 2009
June 24th, 2009
hurr i submitted some research to a journal. do the dance. (doin' the dance)
June 1st, 2009
Abstract
Soil phosphorus limitation is thought to influence plant characteristics and community distribution throughout the Sydney region. Three different sites were selected to represent West Sclerophyll Forest, Dry Sclerophyll Forest and Rainforest vegetation at Royal National Park, Sydney, Australia on the 5th May, 2009. Observations of forest structure and vegetation characteristics were made. These included pictorial depictions of forest layers and characteristics of haphazardly selected representative plant species. Leaf litter composition and specific leaf area of representative species were quantified, as was the total leaf phosphorus content in each habitat. Results indicated that there were observable differences in vegetation composition and structure that were distinctive to each habitat. These included changes in leaf orientation from light maximisation at 180o in Rainforest species, to convective heat dispersal between 45 and 900 in Wet Sclerophyll-canopy and in all Dry Sclerophyll species. An increasing trend in leaf-P content from Dry Sclerophyll to Rainforest supported suggestions that Rainforest vegetation occurred on high-P soils derived from Wianamatta Shale. We found insufficient evidence to conclude that leaf-P content had any influence on SLA, however objective measurement of sclerophylly suggested that leaves were hardest in the Dry Sclerophyll habitat. This coincided with a higher dry mass of leaf litter in the Dry Sclerophyll forest which may be interpreted as a relationship between nutrient availability and increasing degrees of sclerophylly in nutrient-limited environments.
Observations of structural and chemical aspects of vegetation found in Sclerophyll versus Rainforest habitats in Royal National Park with respect to soil phosphorus content.
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Soil phosphorus limitation is thought to influence plant characteristics and community distribution throughout the Sydney region. Three different sites were selected to represent West Sclerophyll Forest, Dry Sclerophyll Forest and Rainforest vegetation at Royal National Park, Sydney, Australia on the 5th May, 2009. Observations of forest structure and vegetation characteristics were made. These included pictorial depictions of forest layers and characteristics of haphazardly selected representative plant species. Leaf litter composition and specific leaf area of representative species were quantified, as was the total leaf phosphorus content in each habitat. Results indicated that there were observable differences in vegetation composition and structure that were distinctive to each habitat. These included changes in leaf orientation from light maximisation at 180o in Rainforest species, to convective heat dispersal between 45 and 900 in Wet Sclerophyll-canopy and in all Dry Sclerophyll species. An increasing trend in leaf-P content from Dry Sclerophyll to Rainforest supported suggestions that Rainforest vegetation occurred on high-P soils derived from Wianamatta Shale. We found insufficient evidence to conclude that leaf-P content had any influence on SLA, however objective measurement of sclerophylly suggested that leaves were hardest in the Dry Sclerophyll habitat. This coincided with a higher dry mass of leaf litter in the Dry Sclerophyll forest which may be interpreted as a relationship between nutrient availability and increasing degrees of sclerophylly in nutrient-limited environments.
Observations of structural and chemical aspects of vegetation found in Sclerophyll versus Rainforest habitats in Royal National Park with respect to soil phosphorus content.
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May 9th, 2009
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ABSTRACT
Nuptial gifts are exchanged for mating opportunities in many invertebrate species including insects and arachnids. Gift-giving is strongly associated with polyandry. Females maximise their reproductive fitness through sperm competition and resource capitalisation, whilst males ensure maximum paternity of all eggs fertilised. Although reproductive interests are conflicting, male investment and female acceptance of gifts suggests that benefits from multiple copulations including nutrient provisioning, increased fecundity, sperm competition and increased paternity are under positive selection pressure.
( Nuptial gifts and polyandry: Conflict resolution between sexes? )
ABSTRACT
Nuptial gifts are exchanged for mating opportunities in many invertebrate species including insects and arachnids. Gift-giving is strongly associated with polyandry. Females maximise their reproductive fitness through sperm competition and resource capitalisation, whilst males ensure maximum paternity of all eggs fertilised. Although reproductive interests are conflicting, male investment and female acceptance of gifts suggests that benefits from multiple copulations including nutrient provisioning, increased fecundity, sperm competition and increased paternity are under positive selection pressure.
( Nuptial gifts and polyandry: Conflict resolution between sexes? )
April 28th, 2009
Title: Cake, chocolate. One slice.
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battle scars
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lithium
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April 26th, 2009
( Consequences of Neotyphodium colonisation on the macronutrient ratio of Lolium perenne and its effects on the nutritional status of the Australian plague locust, Chortoicetes terminifera. )
Abstract
The effects of colonisation by Neotyphodium endophytes on the nutrient ratio of Perennial ryegrass were quantified to examine their interaction with the nutrient status of a major insect herbivore, Chortoicetes terminifera, using no-choice feeding trials followed by nutritionally complementary synthetic diet choice. Endophyte colonisation increased the carbohydrate content of Perennial ryegrass, which was a low protein-high carbohydrate food source in the absence of endophytes. Locusts were protein-deprived following confinement to either colonised (E+) or endophyte-free (E-) ryegrass. Gross dry-matter intake was equal in both treatments. Even though E+ locusts ingested more carbohydrates than E- locusts, the final average mass gain of both groups was equivalent. Nutrient intake and growth patterns observed may be consistent with an interaction between Neotyphodium metabolites and available nutrients interfering with the locust’s intake priorities. These findings suggest that focusing on nutrient regulation by herbivorous insects in the context of metabolite/nutrient interactions will explain the role of fungal endophytes in enhancing plant resistance against some but not all insect herbivores.
Endophyte interactions, Nutrient regulation.
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Abstract
The effects of colonisation by Neotyphodium endophytes on the nutrient ratio of Perennial ryegrass were quantified to examine their interaction with the nutrient status of a major insect herbivore, Chortoicetes terminifera, using no-choice feeding trials followed by nutritionally complementary synthetic diet choice. Endophyte colonisation increased the carbohydrate content of Perennial ryegrass, which was a low protein-high carbohydrate food source in the absence of endophytes. Locusts were protein-deprived following confinement to either colonised (E+) or endophyte-free (E-) ryegrass. Gross dry-matter intake was equal in both treatments. Even though E+ locusts ingested more carbohydrates than E- locusts, the final average mass gain of both groups was equivalent. Nutrient intake and growth patterns observed may be consistent with an interaction between Neotyphodium metabolites and available nutrients interfering with the locust’s intake priorities. These findings suggest that focusing on nutrient regulation by herbivorous insects in the context of metabolite/nutrient interactions will explain the role of fungal endophytes in enhancing plant resistance against some but not all insect herbivores.
Endophyte interactions, Nutrient regulation.
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April 23rd, 2009
April 20th, 2009
March 28th, 2009
cheapened things
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March 5th, 2009
January 31st, 2009
November 10th, 2008
Observations of photosynthesis and productivity in an oat agroecosystem
(Avena sativa cv. Saia: Poaceae): Carbon sink or source?
Abstract
Net primary production and ecosystem productivity were calculated for an oat agroecosystem (Avena sativa cv. Saia: Poaceae) by measuring the photosynthetic response to increasing levels of photosyntheically active radiation (PAR). A net increase in photosynthetic activity occurred in response to increasing PAR. Calculations of net ecosystem productivity indicated that the oat crop was a current sink for carbon dioxide. The carbon status of the oat ecosystem was placed into the context of predicted climatic influences of global warming, which suggested that further manipulative experiments would benefit comparisons of oat crops to other species and ecosystems.
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(Avena sativa cv. Saia: Poaceae): Carbon sink or source?
Abstract
Net primary production and ecosystem productivity were calculated for an oat agroecosystem (Avena sativa cv. Saia: Poaceae) by measuring the photosynthetic response to increasing levels of photosyntheically active radiation (PAR). A net increase in photosynthetic activity occurred in response to increasing PAR. Calculations of net ecosystem productivity indicated that the oat crop was a current sink for carbon dioxide. The carbon status of the oat ecosystem was placed into the context of predicted climatic influences of global warming, which suggested that further manipulative experiments would benefit comparisons of oat crops to other species and ecosystems.
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Hi,
Just a quick e-mail to congratulate you on an exceptionally good report
for the Camden prac. You should be very proud. Official marks haven't
been released yet, but i can say that you did very well.
Good luck with your exams, and whatever you choose to study next year.
Hopefully we will see you studying one or more third year PLNT units.
Regards,
Charlie
Just a quick e-mail to congratulate you on an exceptionally good report
for the Camden prac. You should be very proud. Official marks haven't
been released yet, but i can say that you did very well.
Good luck with your exams, and whatever you choose to study next year.
Hopefully we will see you studying one or more third year PLNT units.
Regards,
Charlie
November 7th, 2008
"Selection be a dynamic process – priorities change like dirty underwear.
Sometimes the washing machine does not work
And then your animals be fubar’d
Hmmm possums. TIMMMMMMMMMMMAAAAAAAAAAYYYYYY
Bleh concentration…fading….battery…draining….c annot sustain consciousness….ererrrrrrrrrrrrrrrrrrghhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Numbats.
Taxis? Yes. Lock them up so logs wil not fall on them. Logs bad! There parkhuh flbehe.
YAY."
Sometimes the washing machine does not work
And then your animals be fubar’d
Hmmm possums. TIMMMMMMMMMMMAAAAAAAAAAYYYYYY
Bleh concentration…fading….battery…draining….c
Numbats.
Taxis? Yes. Lock them up so logs wil not fall on them. Logs bad! There parkhuh flbehe.
YAY."
i am seriously pissed off that people who couldn't be bothered to work to the deadline given scored higher than i did. because i worked to the fucking deadline. we all have the same amount of work. if i can deal with it, so should you. CHEATERS.
fuck you all.
fuck you all.

