+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The water-cohesion-tension insufficiency syndrome of forest decline

, : The water-cohesion-tension insufficiency syndrome of forest decline. Journal of theoretical biology, 156(2): 235-267

The water-cohesion-tension insufficiency hypothesis, which suggests the primary reason for forest decline produced by air pollutants to be an increase of cavitational rupture and embolism of negative pressure water within the water carrying tracheids and vessels of the tree xylem, has been examined in detail. A thermodynamic model of water under tension is presented which is based on the van der Waals equation in which the interaction between water molecules subject to negative pressure has been elaborated and tested by computer simulation. The hypothesis explains typical reactions of affected trees (e.g. formation of "stork nests", "anxiety" sprouts, reduction of leaf and needle sizes, shedding of needles) as adaptations to decreased tensile strength of water in tree xylem water conduits. In support of the proposed mechanism a comparative study of tree diseases has been made in which rupture of sap flow (cavitation) is caused by fungi (e.g. Dutch elm disease). It is shown that symptoms occur comparable to those trees damaged by air pollution. The presented hypothesis predicts that the forest decline is basically proportional to the product of dry deposition of pollutants (particulate matter, ozone, hydrogen peroxide and acidic gas) and the water stress experienced by trees. A comparative study of forest decline in Europe and Japan, as well as an evaluation of preliminary results of large scale experimental research on forest decline in Germany suggests that the observed patterns can qualitatively be explained. Possible mechanisms for pollution induced cavitation and embolism in xylem water conduits are discussed and necessary experimental research for verification of the hypothesis outlined.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 002530994

DOI: 10.1016/s0022-5193(05)80675-7

PDF Full Text: The water-cohesion-tension insufficiency syndrome of forest decline

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Gunsett, R.P.; Mulick, J.A.; Fernald, W.B.; Martin, J.L., 1989: Indications for medical screening prior to behavioral programming for severely and profoundly mentally retarded clients. Journal of Autism and Developmental Disorders 19(1): 167-172

Bock, H.E.; Gross, R., 1954: Leukemia and tumor treatment with a secondary alkaloid from Colchicum autumnale. Clinical and exptl. observations were made with an alkaloid obtained from Colchicum autumnale (Demecolcine). This was applied to 27 patients with leukemia or malignant tumors in altogether 35 courses.

RICHARDS, M., 1954: Atmospheric mold spores in and out of doors. In houses which are observedly moldy, the mold spore content of the air may be different in constitution (as well as quantity) from that of the outside air. Culture experiments show that the molds growing in such houses are usually the common atmo...

Tripodi, G.; Valtorta, F.; Marchisto, P.C.rlo; Torielli, L.; Salardi, S.; Ferrari, P.; Bianchi, G., 1995: Adducin isoforms affect cell functions in MHS hypertension. Hypertension (Dallas) 26(3): 573

Wright-Hughes, A.; Graham, E.; Farrin, A.; Collinson, M.; Boston, P.; Eisler, I.; Fortune, S.; Green, J.; House, A.; Owens, D.; Simic, M.; Tubeuf, S.; Nixon, J.; McCabe, C.; Kerfoot, M.; Cottrell, D., 2016: Self-Harm Intervention: Family Therapy (SHIFT), a study protocol for a randomised controlled trial of family therapy versus treatment as usual for young people seen after a second or subsequent episode of self-harm. Self-harm is common in the community with a lifetime prevalence of 13 %. It is associated with an elevated risk of overall mortality and suicide. People who harm themselves are high users of public services. Estimates of the 1-year risk of repetit...

Crouzet C.; Rochette P.; Menard G., 1996: Use of thermopaleomagnetism in Dauphine Zone, Western Alps, France; geochronologic and tectonic implications. Reunion Annuelle des Sciences de la Terre 7: 23

Peretz, B.; Yakir, O.; Fuks, A.B., 1997: Follow up after root canal treatment of young permanent molars. The purpose of the present study was to assess the success of root canal treatment in permanent molars of children and adolescents. Twenty-eight endodontically treated first permanent molars of 18 patients aged 8 to 16 years at the time of treatme...

Cutini, A.; Teruel, M.; Cabodevila, J.; Alberio, R.; Callejas, S., 2003: Direct transfer of vitrified bovine embryos produced in vitro and in vivo. Development rate of day 7 and 8 in vitro produced embryos was assessed by the reexpansion of the blastocoel and hatching during 72 h of culture. In vivo produced embryos were transferred to synchronized recipients, and pregnancy diagnosis was cond...

Mikelsaar, R.; Muru, K.; Varb, K.; Kulla, A.; Suvari, A., 2002: Partial deletion 18p in a patient with psoriasis vulgaris. European Journal of Human Genetics 10(Supplement 1): 151

Chen, K.S.; Heydrick, S.; Kurowski, T.; Ruderman, N.B., 1991: Diacylglycerol-protein kinase C signalling in skeletal muscle: a possible link to insulin resistance. Transactions of the Association of American Physicians 104: 206-212