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-spartina01313nas a2200133   4500008004100000245010000041210006900141300001100210490000700221520087100228653002201099100001801121856004001139       1996                        eng d00aUse of coleopteran prey by Phidippus audax (Araneae, Salticidae ) in tallgrass prairie wetlands0 aUse of coleopteran prey by Phidippus audax Araneae Salticidae in  a39 -420 v243 aPhidippus audax (Hentz 1845) was observed in the field and tested in a laboratory in order to estimate its use of two locally abundant, soft-bodied coleopteran species, Diabrotica undecimpunctata (Chrysomelidae, Galerucinae) and Chauliognathus pennsylvanicus (Cantharidae). In the field, Phidippus audax was most commonly observed hunting on leaves or stems of the common milkweed and feeding upon species of Diptera or Diabrotica undecimpunctata. Despite high densities of Chauliognathus pennsylvanicus, P. audax was never observed feeding upon this species. In laboratory feeding trials, P. audax always retreated from C. pennsylvanicus and always attacked D. undecimpunctata. Also, P. audax retreated from models displaying the markings of C. pennsylvanicus in 88% and attacked models displaying the markings of D. undecimpunctata in 85% of the laboratory trials.10atallgrass prairie1 aJohnson, S.R.  uhttp://www.jstor.org/stable/370586500506nas a2200121   4500008004100000245010100041210006900142300001100211653002200222100001800244700001900262856010300281       1995                        eng d00aGas exchange and reproduction of Spiranthes vernalis (Orchidaceae) in a Kansas tallgrass prairie0 aGas exchange and reproduction of Spiranthes vernalis Orchidaceae  a21 -2410atallgrass prairie1 aJohnson, S.R.1 aHartnett, D.C.  uhttp://images.library.wisc.edu/EcoNatRes/EFacs/NAPC/NAPC14/reference/econatres.napc14.sjohnson.pdf02072nas a2200145   4500008004100000245011100041210006900152300001100221490000700232520149700239653002201736100001801758700002001776856013001796       1995                        eng d00aThe influence of fire on Spartina pectinata wetland communities in a northeastern Kansas tallgrass prairie0 ainfluence of fire on Spartina pectinata wetland communities in a  a84 -900 v733 aWetlands dominated by the C4 grass Spartina pectinata were investigated to quantify differences in plant species composition and diversity in response to fire frequency. The study site was a tallgrass prairie in northeastern Kansas that included Spartina wetlands subjected to spring fires at 1-, 2-, 4-, 10-, and 20-year intervals. Because C3 forbs in these wetlands responded strongly to different fire frequencies, the light environment and gas exchange responses of the ubiquitous forb Asclepias syriaca were also assessed. In general, species diversity was lower in annually burned wetlands because of lower forb diversity. Maximum H′ in annually burned sites was 1.64 versus 2.77 in 10- and 20-year burned sites. However, individual forb responses varied. Asclepias increased and Solidago canadensis and Galium aparine decreased in importance with increasing fire frequency. Canopy sunlight interception was greater in annually burned wetlands than in wetlands with lower burn frequencies. Despite reduced light availability, midseason photosynthetic rates of Asclepias were higher in annually burned sites. The results suggest that frequent fire in tallgrass prairie wetlands results in less diverse plant communities, similar to responses of upland prairie, and that the timing of fire, relative to life history and phenology of the subordinate species, strongly influences responses of individual forbs. Key words: wetlands, tallgrass prairie, Spartina pectinata communities, fire.10atallgrass prairie1 aJohnson, S.R.1 aKnapp, Alan, K.  uhttp://lter.konza.ksu.edu/content/influence-fire-spartina-pectinata-wetland-communities-northeastern-kansas-tallgrass-prairie00468nas a2200109   4500008004100000245009500041210006900136300001100205490000700216100001800223856011700241       1995                        eng d00aNests of Hibana gracilis are reused by Phidippus clarus in wetlands of northeastern Kansas0 aNests of Hibana gracilis are reused by Phidippus clarus in wetla  a44 -450 v231 aJohnson, S.R.  uhttp://lter.konza.ksu.edu/content/nests-hibana-gracilis-are-reused-phidippus-clarus-wetlands-northeastern-kansas00632nas a2200157   4500008004100000245008900041210006900130260005100199300001200250653002200262100001800284700002000302700001900322700002000341856011300361       1995                        eng d00aThe role of fire in Spartina pectinata wetlands dominated tallgrass prairie wetlands0 arole of fire in Spartina pectinata wetlands dominated tallgrass   aTallahassee, FLbTall Timbers Research Station  a92 -10110atallgrass prairie1 aJohnson, S.R.1 aKnapp, Alan, K.1 aCerulean, S.I.1 aEngstroms, R.T.  uhttp://lter.konza.ksu.edu/content/role-fire-spartina-pectinata-wetlands-dominated-tallgrass-prairie-wetlands01158nas a2200121   4500008004100000245010900041210006900150300001300219490000700232520072200239100001800961856005700979       1995                        eng d00aSpider communities in the canopies of annually burned and long-term unburned Spartina pectinata wetlands0 aSpider communities in the canopies of annually burned and longte  a832 -8340 v243 aWetlands dominated by Prairie Cordgrass, Spartina pectina (Poaceae), burned annually or at 10- to 20-y intervals were investigated in 1993 and 1994 to quantify the effects of fire on spider community structure and population density. Burned and unburned wetlands had similar spider species; however, annually burned wetlands had both greater species richness and higher spider densities than long-term unburned wetlands. These dynamics parallel differences in insect densities in these wetlands. Previous work has shown that annually burned S. pectinata has much higher annual productivity; thus, the greater number and density of spiders in annually burned wetlands are consistent with these increased energy inputs.1 aJohnson, S.R.  uhttp://cat.inist.fr/?aModele=afficheN&cpsidt=365239800483nas a2200121   4500008004100000245006700041210006600108260004300174300001100217490002100228100001800249856009400267       1994                        eng d00aEcology of Spartina pectinata  wetlands in northeastern Kansas0 aEcology of Spartina pectinata wetlands in northeastern Kansas  aManhattan, KSbKansas State University  a1 -1040 vPhD Dissertation1 aJohnson, S.R.  uhttp://lter.konza.ksu.edu/content/ecology-spartina-pectinata-wetlands-northeastern-kansas00462nas a2200109   4500008004100000245009100041210006900132300001300201490000700214100001800221856011300239       1994                        eng d00aResponse of roundleaf monkeyflower to flooding in small streams in northeastern Kansas0 aResponse of roundleaf monkeyflower to flooding in small streams   a309 -3100 v261 aJohnson, S.R.  uhttp://lter.konza.ksu.edu/content/response-roundleaf-monkeyflower-flooding-small-streams-northeastern-kansas01216nas a2200133   4500008004100000245009500041210006900136300001300205490000700218520077400225653000900999100001801008856005601026       1994                        eng d00aWind induced leaf binding by prairie cordgrass onto common milkweed in northeastern Kansas0 aWind induced leaf binding by prairie cordgrass onto common milkw  a301 -3050 v263 aIn this study, I investigated an interaction between prairie cordgrass (Spartina pectinata) and common milkweed (Asclepias syriaca) where leaves of cordgrass became tightly bound to milkweed stems, primarily at upper nodes. Milkweed plants involved in this interaction typically had damaged leaves and increased fruit production compared to unbound milkweed plants. Cordgrass leaves apparently, by the action of wind, become wrapped around structures that are stiff and rough surfaced. No binding interactions took place between cordgrass and wooden dowels set in wetlands and designed to imitate the growth form of common milkweed. Likewise, no interactions occurred between cordgrass and hemp dogbane, a plant of similar growth form to milkweed but with smooth stems.10aWind1 aJohnson, S.R.  uhttp://eurekamag.com/research/009/736/009736310.php01652nas 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-wetlands00466nas a2200109   4500008004100000245009300041210006900134300001000203490000700213100001800220856011800238       1993                        eng d00aJumping spiders nest in red plastic area marker flags in prairies of Northeastern Kansas0 aJumping spiders nest in red plastic area marker flags in prairie  a275 -0 v251 aJohnson, S.R.  uhttp://lter.konza.ksu.edu/content/jumping-spiders-nest-red-plastic-area-marker-flags-prairies-northeastern-kansas