01997nas a2200193   4500008004100000245012000041210006900161300001500230490000700245520129500252653001201547653001601559653002401575653001901599653002101618653002301639100001801662856012301680       1996                        eng d00aImpact of Ischnodemus falcus (Hemiptera: Lygaeidae) on photosynthesis and production of Spartina pectinata wetlands0 aImpact of Ischnodemus falcus Hemiptera Lygaeidae on photosynthes  a1122 -11270 v253 aWetlands dominated by the C4 grass. Spartina pectinata (Link), were investigated to quantity the effects of high densities of lsehnodemus falicus (Say) on leaf-level photosynthesis and aboveground biomass production. Photosynthetic rates of plants within heavily infested stands were greatly reduced from that of plants supporting low densities of I. falicus. In early May 1993, photosynthetic rates of S. pectinata with minor I. falicus presence were >30 μmol m−2 s−1 with peak rates of 45 μmo1 m−2 s−1 in mid-June. In nearby infested S. pectinata wetlands, individual plants had rates as low as 5 μmol m−2 s−1 in early May and peak rates of 24 μmol m−2 s−1 in mid-July. Along with reduced photosynthetic rates, plants hosting high insect densities had lower aboveground production than did plants that had low insect densities. In 1994, when insect densities were ubiquitously low, there were no differences in peak photosynthetic rates or biomass accumulation between stands of S. pectinata that had been host to high versus low densities of insects in 1993. Thus, although infestation of I. falicus on S. pectinata had significant short–term effects, the lack of a long–term effect suggests that S. pectinata can successfully deal with periodic insect outbreaks.10abiomass10ainfestation10alschnodemus falicus10aphotosynthesis10aprairie wetlands10aSpartina pectinata1 aJohnson, S.R.  uhttp://lter.konza.ksu.edu/content/impact-ischnodemus-falcus-hemiptera-lygaeidae-photosynthesis-and-production-spartina01652nas a2200205   4500008004100000245009700041210006900138300001300207490000700220520095600227653000901183653001701192653002101209653001501230653002301245653002201268100001801290700002001308856011801328       1993                        eng d00aThe effect of fire on gas exchange and aboveground production in Spartina pectinata wetlands0 aeffect of fire on gas exchange and aboveground production in Spa  a299 -3030 v133 aPhotosynthetic and growth responses ofSpartina pectinata were compared in annually and biennially burned wetlands in a northeastern Kansas tallgrass prairie. Photosynthetic CO2 uptake was consistently higher inSpartina pectinata in annually burned wetlands, and there was a seasonal difference in maximum photosynthetic rates. Plants in annually burned wetlands reached a maximum photosynthetic rate of 38.2 μmol m−2 s−1 in late spring, while maximum photosynthesis in plants of biennially burned wetlands was 28.6 μmol m−2 s−1 in late summer. Culm density in these wetlands was not affected by fire; however, aboveground biomass production, inflorescence density and plant height at anthesis were significantly greater in annually burned wetlands. These results indicate thatSpartina pectinata may be a fire-dependent species, with post-fire responses similar to the dominant grasses in tallgrass prairie as well as otherSpartina congeners.10afire10agas exchange10aprairie wetlands10aproduction10aSpartina pectinata10atallgrass prairie1 aJohnson, S.R.1 aKnapp, Alan, K.  uhttp://lter.konza.ksu.edu/content/effect-fire-gas-exchange-and-aboveground-production-spartina-pectinata-wetlands