http://www.cnr.it/ontology/cnr/individuo/prodotto/ID76770

Weather variability effect on phenological events in a Mediterranean-type climate (Contributo in atti di convegno)

Type

Contributo in atti di convegno (Classe)
Prodotto della ricerca (Classe)

Label

Weather variability effect on phenological events in a Mediterranean-type climate (Contributo in atti di convegno) (literal)

Anno

2002-01-01T00:00:00+01:00 (literal)

Alternative label

Duce P, Cesaraccio C, Spano D, Snyder RL (2002)
Weather variability effect on phenological events in a Mediterranean-type climate
in 15th Conference on Biometeorology/Aerobiology and 16th International Congress of Biometeorology, Kansas City, Missouri, USA, 27 October --1 November 2002
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Duce P, Cesaraccio C, Spano D, Snyder RL (literal)

Pagina inizio

377 (literal)

Pagina fine

378 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

https://ams.confex.com/ams/15BioAero/webprogram/Paper49172.html (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume

Proceedings of the 15th Conference on Biometeorology/Aerobiology and 16th International Congress of Biometeorology (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

28 October 1 November 2002, pp. 377-378. (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

2 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Duce P, Cesaraccio C: CNR-IBIMET, Sassari Spano D: Dipartimento di Economia e Sistemi Arborei, DESA, Università di Sassari Snyder RL: Department of Land, Air and Water Resources, University of California, Davis (literal)

Titolo

Weather variability effect on phenological events in a Mediterranean-type climate (literal)

Abstract

The Mediterranean climate presents a distinct seasonality that greatly affects phenological development of natural vegetation. In a Mediterranean climate, summers are hot and dry, whereas winters are cool and wet. Most phenological models use temperature-based heat unit accumulation (e. g., degree-days) as a measure of developmental or growth rates. However, the effect of rainfall and, hence, water stress on phenology is also important in arid, Mediterranean regions. The objectives of this study were to evaluate both temperature and soil water availability effects on the flowering date of several natural plant species growing in a Mediterranean-type climate. The study was conducted in the Phenological Research Garden located in Oristano (Sardinia), Italy. Phenological data were collected for five Mediterranean species and four species typical of higher latitudes. Temperature data were employed to calculate cumulated degree-days (CDD) from 1 January until flowering using hourly mean temperature values obtained from an empirical model that approximates diurnal temperature curve from daily maximum and minimum air temperature. Drought conditions of the experimental period (11 years) were evaluated by calculating the available water capacity for each day using a simple soil-water balance model based on measured rainfall and estimated evapotranspiration rate. The results showed that the accuracy of CDD model in predicting flowering dates was generally good for most species, although the performance of heat unit model was variable over years. A significant improvement in the prediction of the flowering date was obtained by adjusting the CDD model for available soil water content. In general, the flowering dates were postponed when the soil water was not limiting and flowering occurred before severe water stress during drought years. (literal)

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