Karen McKee, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 70
A comparison of physiological indicators of sublethal cadmium stress in wetland plants A comparison of physiological indicators of sublethal cadmium stress in wetland plants
Physiological indices, including photosynthesis, chlorophyll fluorescence, adenylate energy charge (AEC) ratio, and leaf reflectance, were determined for Typha domingensis and Spartina alterniflora in response to increasing concentrations of Cd and compared with the growth responses of these species. Leaf expansion, the live/total ratio of plant aboveground biomass, and the aboveground...
Authors
I.A. Mendelssohn, K.L. McKee, T. Kong
Species and population variation to salinity stress in Panicum hemitomon, Spartina patens, and Spartina alterniflora: Morphological and physiological constraints Species and population variation to salinity stress in Panicum hemitomon, Spartina patens, and Spartina alterniflora: Morphological and physiological constraints
Panicum hemitomon, Spartina patens, and Spartina alterniflora are wide-spread dominant grasses of fresh, brackish, and salt marsh plant communities, respectively. Our previous research identified significant intraspecific variation in salt tolerance and morphology among populations within each species. In this study our objectives were to determine shorter-term physiological/biochemical...
Authors
M.W. Hester, I.A. Mendelssohn, K.L. McKee
Degradation of mangrove tissues and implications for peat formation in Belizean island forests Degradation of mangrove tissues and implications for peat formation in Belizean island forests
1. Macrofaunal leaf consumption and degradation of leaves, woody twigs and roots were studied in mangrove island forests on a Belizean island. Factors influencing accumulation of organic matter deposited both above and below ground in this oligotrophic, autochothonous system were assessed. 2. Leaf degradation rates of Rhizophora mangle (red mangrove), Avicennia germinans (black mangrove)...
Authors
B.A. Middleton, K.L. McKee
Root proliferation in decaying roots and old root channels: A nutrient conservation mechanism in oligotrophic mangrove forests? Root proliferation in decaying roots and old root channels: A nutrient conservation mechanism in oligotrophic mangrove forests?
1. In oligotrophic habitats, proliferation of roots in nutrient-rich microsites may contribute to overall nutrient conservation by plants. Peat-based soils on mangrove islands in Belize are characterized by the presence of decaying roots and numerous old root channels (0.1-3.5 cm diameter) that become filled with living and highly branched roots of Rhizophora mangle and Avicennia...
Authors
K.L. McKee
Growth, biomass allocation and nutrient use efficiency in Cladium jamaicense and Typha domingensis as affected by phosphorus and oxygen availability Growth, biomass allocation and nutrient use efficiency in Cladium jamaicense and Typha domingensis as affected by phosphorus and oxygen availability
The effects of phosphorus (P) and oxygen availability on growth, biomass allocation and nutrient use efficiency in Cladium jamaicense Crantz and Typha domingensis Pers. were studied in a growth facility equipped with steady-state hydroponic rhizotrons. The treatments included four P concentrations (10, 40, 80 and 500 ??g I-1) and two oxygen concentration (8.0 and
Authors
B. Lorenzen, H. Brix, I.A. Mendelssohn, K.L. McKee, S.L. Miao
Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis
The germination requirements of Cladium jamaicense Crantz and Typha domingensis Pers. were studied under controlled conditions in the laboratory. Treatments included six temperature regimes, (constant temperatures of 15 20, 25, 30°C, and two fluctuating day : night temperature regimes of 25 : 10°C and 30 : 20°C), two light levels (14 : 10 h light : dark photoperiod and 24 h dark...
Authors
Bent Lorenzen, Hans Brix, Karen L. McKee, I.A. Mendelssohn, ShiLi Miao
Science and Products
Filter Total Items: 70
A comparison of physiological indicators of sublethal cadmium stress in wetland plants A comparison of physiological indicators of sublethal cadmium stress in wetland plants
Physiological indices, including photosynthesis, chlorophyll fluorescence, adenylate energy charge (AEC) ratio, and leaf reflectance, were determined for Typha domingensis and Spartina alterniflora in response to increasing concentrations of Cd and compared with the growth responses of these species. Leaf expansion, the live/total ratio of plant aboveground biomass, and the aboveground...
Authors
I.A. Mendelssohn, K.L. McKee, T. Kong
Species and population variation to salinity stress in Panicum hemitomon, Spartina patens, and Spartina alterniflora: Morphological and physiological constraints Species and population variation to salinity stress in Panicum hemitomon, Spartina patens, and Spartina alterniflora: Morphological and physiological constraints
Panicum hemitomon, Spartina patens, and Spartina alterniflora are wide-spread dominant grasses of fresh, brackish, and salt marsh plant communities, respectively. Our previous research identified significant intraspecific variation in salt tolerance and morphology among populations within each species. In this study our objectives were to determine shorter-term physiological/biochemical...
Authors
M.W. Hester, I.A. Mendelssohn, K.L. McKee
Degradation of mangrove tissues and implications for peat formation in Belizean island forests Degradation of mangrove tissues and implications for peat formation in Belizean island forests
1. Macrofaunal leaf consumption and degradation of leaves, woody twigs and roots were studied in mangrove island forests on a Belizean island. Factors influencing accumulation of organic matter deposited both above and below ground in this oligotrophic, autochothonous system were assessed. 2. Leaf degradation rates of Rhizophora mangle (red mangrove), Avicennia germinans (black mangrove)...
Authors
B.A. Middleton, K.L. McKee
Root proliferation in decaying roots and old root channels: A nutrient conservation mechanism in oligotrophic mangrove forests? Root proliferation in decaying roots and old root channels: A nutrient conservation mechanism in oligotrophic mangrove forests?
1. In oligotrophic habitats, proliferation of roots in nutrient-rich microsites may contribute to overall nutrient conservation by plants. Peat-based soils on mangrove islands in Belize are characterized by the presence of decaying roots and numerous old root channels (0.1-3.5 cm diameter) that become filled with living and highly branched roots of Rhizophora mangle and Avicennia...
Authors
K.L. McKee
Growth, biomass allocation and nutrient use efficiency in Cladium jamaicense and Typha domingensis as affected by phosphorus and oxygen availability Growth, biomass allocation and nutrient use efficiency in Cladium jamaicense and Typha domingensis as affected by phosphorus and oxygen availability
The effects of phosphorus (P) and oxygen availability on growth, biomass allocation and nutrient use efficiency in Cladium jamaicense Crantz and Typha domingensis Pers. were studied in a growth facility equipped with steady-state hydroponic rhizotrons. The treatments included four P concentrations (10, 40, 80 and 500 ??g I-1) and two oxygen concentration (8.0 and
Authors
B. Lorenzen, H. Brix, I.A. Mendelssohn, K.L. McKee, S.L. Miao
Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis
The germination requirements of Cladium jamaicense Crantz and Typha domingensis Pers. were studied under controlled conditions in the laboratory. Treatments included six temperature regimes, (constant temperatures of 15 20, 25, 30°C, and two fluctuating day : night temperature regimes of 25 : 10°C and 30 : 20°C), two light levels (14 : 10 h light : dark photoperiod and 24 h dark...
Authors
Bent Lorenzen, Hans Brix, Karen L. McKee, I.A. Mendelssohn, ShiLi Miao