Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Ludger Kappen"'
Autor:
Dirk Wessels, Ludger Kappen
Publikováno v:
Koedoe: African Protected Area Conservation and Science, Vol 36, Iss 1, Pp 27-48 (1993)
The photosynthetic behaviour of endolithic andepilithic lichens characteristic of sedimentary and volcanic rock was investigated in situ in the Mountain Zebra National Park, South Africa. The park forms part of an inland semi-desert known as the Karo
Externí odkaz:
https://doaj.org/article/fb5b14cadbf549c786890f9142dcf352
Publikováno v:
Handbuch der Umweltwissenschaften
In diesem Kapitel beschranken wir uns auf die exemplarische Darstellung von 3 Symbiosetypen, die fur die Primarproduktion in Okosystemen eine entscheidende Rolle spielen. Die Flechten als Primarproduzenten, die zur Besiedelung der unterschiedlichsten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::639bf95a06db393a834b8581bcab86b6
https://doi.org/10.1002/9783527678525.hbuw1998009
https://doi.org/10.1002/9783527678525.hbuw1998009
Autor:
G. Stolley, Ludger Kappen
Publikováno v:
Nova Hedwigia. 75:121-175
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eca65cc488cc18e14125092b436e9c62
https://doi.org/10.1127/0029-5035/2002/0075-0121
https://doi.org/10.1127/0029-5035/2002/0075-0121
Publikováno v:
Basic and Applied Ecology. 3:157-169
Summary Fluxes of carbon dioxide, water vapour, heat and momentum over a northern German beech forest were measured by use of the eddy covariance technique. The canopy conductance to water vapour transfer, g c , was calculated for daylight periods wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4dff60bf7d2364e6fc8f24c4f119737
https://doi.org/10.1078/1439-1791-00093
https://doi.org/10.1078/1439-1791-00093
Publikováno v:
New Phytologist. 150:157-168
Summary • Variation in root respiration and total soil respiration measured in the field in an alder (Alnus glutinosa) forest is reported here, complementing previous studies of below-ground carbon relations. • A novel technique, involving minimu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac3859a7ea7bf6dcb931e820f0bd2bcc
https://doi.org/10.1046/j.1469-8137.2001.00071.x
https://doi.org/10.1046/j.1469-8137.2001.00071.x
Publikováno v:
Basic and Applied Ecology. 2:351-364
Summary Stomatal conductance, which controls both the exchange of water vapour and CO 2 , is thought to be strictly determined by stomatal aperture. However, water transport processes might be modified by deposition of hygroscopic salts on the leaf s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac2ec1e2f3122c5f889551c17d1cbc0c
https://doi.org/10.1078/1439-1791-00062
https://doi.org/10.1078/1439-1791-00062
Publikováno v:
Scopus-Elsevier
Summary The photosynthetic capacity of lecanorine apothecia, and their relative importance for the CO 2 balance of the thallus have been evaluated in the fruticose desert lichen Teloschistes lacunosus (RUPR.) SAV. under laboratory conditions. Three k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f70533647455a1e1f4cfb4956165204e
https://doi.org/10.1016/s0367-2530(17)30055-5
https://doi.org/10.1016/s0367-2530(17)30055-5
Autor:
Werner L. Kutsch, Wolf Steinborn, Rainer Baumann, Ludger Kappen, Mathias Herbst, Jan Barkmann
Publikováno v:
Ecosystems. 4:49-66
In this study, we take an ecosystem approach to examine the degree of biological self-organization at the ecosystem level. An integrated set of indicators is derived from a theoretical framework and tested by field data from an ecosystem research pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0ea6c0b6fa53d4e7f5cb05705240464
https://doi.org/10.1007/s100210000059
https://doi.org/10.1007/s100210000059
Autor:
Renate Vanselow, Mathias Herbst, Poul Hummelshøj, Niels Otto Jensen, Ludger Kappen, Werner L. Kutsch
Publikováno v:
Basic and Applied Ecology. 2:265-281
Summary The response of beech leaves to leaf-to-air vapour pressure deficit (VPD) is not constant throughout the growing season. In situ measurements of leaf gas exchange showed that this intra-annual variation of stomatal sensitivity to VPD cannot b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bed41f7da9c6bf83c835c205c13d5f6a
https://doi.org/10.1078/1439-1791-00054
https://doi.org/10.1078/1439-1791-00054
Publikováno v:
Journal of Plant Nutrition and Soil Science. 163:481-489
The underlying question of these investigations asked, how and to which extent rape plants react with transpiration and soil water uptake to different degrees of nitrogen fertilization. Therefore repeated campaigns with concurrent measurements of pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f37acfd66cbcf185ce210f4ece19d03
https://doi.org/10.1002/1522-2624(200010)163:5<481::aid-jpln481>3.0.co
https://doi.org/10.1002/1522-2624(200010)163:5<481::aid-jpln481>3.0.co