Light responses of Carex planostachys from various microsites in a Juniperus community

Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition

“…Low I comp values of plants, including sedges, have been reported mainly for herbaceous species occurring in a variable light environment under a deciduous forest canopy 53 . This I comp usually increases from sites below a dense canopy towards canopy gaps, ranging from 4.2 ± 2.1 to 17.0 ± 2.9 μmol m −2 s −1 54 . Smith and Houpis 43 presented I comp of Schoenoplectus hallii of about 24 μmol m −2 s −1 .…”

Gas Exchange Rates of Three Sub-Shrubs of Central Texas Savannas

“…The light compensation point was calculated as the PFD when the photosynthetic rate 5 0 mmol CO 2 /m 2 /s (xintercept of the line for the initial slope or rate). The quantum yield efficiency or initial slope was calculated using the dark value and increasing PFDs until the regression coefficient of the slope decreased (150 mmol/m 2 /s PFD) (Furuya and Van Auken 2009;Wayne and Van Auken 2009).…”

“…This type of gradient occurs, proceeding from west to east, on the Edwards Plateau in central Texas (Van Auken and McKinley 2008). Although the structure of some of the communities along this rainfall gradient have been described (Van Auken and McKinley 2008;Van Auken and Smeins 2008;Wayne and Van Auken 2008), the reasons that various species occur in defined places and at certain densities along this gradient are not clear and predicting the dynamics of this biphasic system is challenging (House et al 2003).…”