title: Bioaccumulation of heavy metals in fishes from Taihu Lake, China

authors: Chi, Qiao-Qiao

subjects: fish

abstract: The Cr, Zn, Cu, Cd, Pb contents were determined in Cyprinus carpio Linnaeus, Carassius auratus Linnaeus, Hypophthalmichthys molitrix and Aristichthys nobilis, which were caught from Meiliang Bay, Taihu Lake, a large, shallow and eutrophic lake of China. The results showed that: (1) the Cr, Cu, Pb, Cd contents in the edible parts of the four fish species were much lower than Chinese Food Health Criterion (1994), but the Zn contents were higher than the Criterion; (2) Cd contents were the highest in the liver of fish, Pb contents were almost the same in all organs of fish, Cr contents mainly enriched in the skin and gonads, Zn contents were the highest in the gonad (♀), and Cu contents were the highest in the liver; (3) the total metal accumulation was the greatest in the liver and the lowest in the muscle. The total metal accumulation was the highest in C. auratus L. This investigation indicated that fish products in Taihu Lake were still safe for human consumption, but the amount consumed should be controlled under the Chinese Food Health Criterion to avoid excessive intake of Zn.

text: Bioaccumulation of heavy metals in fishes from Taihu Lake, China The Cr, Zn, Cu, Cd, Pb contents were determined in Cyprinus carpio Linnaeus, Carassius auratus Linnaeus, Hypophthalmichthys molitrix and Aristichthys nobilis, which were caught from Meiliang Bay, Taihu Lake, a large, shallow and eutrophic lake of China. The results showed that: (1) the Cr, Cu, Pb, Cd contents in the edible parts of the four fish species were much lower than Chinese Food Health Criterion (1994), but the Zn contents were higher than the Criterion; (2) Cd contents were the highest in the liver of fish, Pb contents were almost the same in all organs of fish, Cr contents mainly enriched in the skin and gonads, Zn contents were the highest in the gonad (♀), and Cu contents were the highest in the liver; (3) the total metal accumulation was the greatest in the liver and the lowest in the muscle. The total metal accumulation was the highest in C. auratus L. This investigation indicated that fish products in Taihu Lake were still safe for human consumption, but the amount consumed should be controlled under the Chinese Food Health Criterion to avoid excessive intake of Zn.

year: 2007

title: Light interception efficiency explained by two simple variables: a test using a diversity of small- to medium-sized woody plants

authors: Duursma, R.A.

subjects: leaf area index

abstract: •Plant light interception efficiency is a crucial determinant of carbon uptake by individual plants and by vegetation. Our aim was to identify whole-plant variables that summarize complex crown architecture, which can be used to predict light interception efficiency.
•We gathered the largest database of digitized plants to date (1831 plants of 124 species), and estimated a measure of light interception efficiency with a detailed three-dimensional model. Light interception efficiency was defined as the ratio of the hemispherically averaged displayed to total leaf area. A simple model was developed that uses only two variables, crown density (the ratio of leaf area to total crown surface area) and leaf dispersion (a measure of the degree of aggregation of leaves).
•The model explained 85% of variation in the observed light interception efficiency across the digitized plants. Both whole-plant variables varied across species, with differences in leaf dispersion related to leaf size. Within species, light interception efficiency decreased with total leaf number. This was a result of changes in leaf dispersion, while crown density remained constant.
•These results provide the basis for a more general understanding of the role of plant architecture in determining the efficiency of light harvesting.

text: Light interception efficiency explained by two simple variables: a test using a diversity of small- to medium-sized woody plants •Plant light interception efficiency is a crucial determinant of carbon uptake by individual plants and by vegetation. Our aim was to identify whole-plant variables that summarize complex crown architecture, which can be used to predict light interception efficiency.
•We gathered the largest database of digitized plants to date (1831 plants of 124 species), and estimated a measure of light interception efficiency with a detailed three-dimensional model. Light interception efficiency was defined as the ratio of the hemispherically averaged displayed to total leaf area. A simple model was developed that uses only two variables, crown density (the ratio of leaf area to total crown surface area) and leaf dispersion (a measure of the degree of aggregation of leaves).
•The model explained 85% of variation in the observed light interception efficiency across the digitized plants. Both whole-plant variables varied across species, with differences in leaf dispersion related to leaf size. Within species, light interception efficiency decreased with total leaf number. This was a result of changes in leaf dispersion, while crown density remained constant.
•These results provide the basis for a more general understanding of the role of plant architecture in determining the efficiency of light harvesting.

year: 2012-01

title: Conclusion: Relationships of interdependence—Making the difference together

authors: Berryman, Mere

abstract: This chapter begins by taking a brief look at New Zealand history. It then presents two different Māori whakataukī as metaphors, both to reconnect to the beginning of the book and also to make connections throughout the book as a whole. These metaphors are used to bring the chapters together and to consider how inclusion, a term that is often highly contested and poorly understood (Wearmouth, 2009), might begin to be better understood and applied when working with Māori children and young people with disabilities, or special education needs, or both, and with their families.

text: Conclusion: Relationships of interdependence—Making the difference together This chapter begins by taking a brief look at New Zealand history. It then presents two different Māori whakataukī as metaphors, both to reconnect to the beginning of the book and also to make connections throughout the book as a whole. These metaphors are used to bring the chapters together and to consider how inclusion, a term that is often highly contested and poorly understood (Wearmouth, 2009), might begin to be better understood and applied when working with Māori children and young people with disabilities, or special education needs, or both, and with their families.

year: 2015