Data/hora: 16/06/2024 09:26:21

Provedor de dados: | 17
País: | United Kingdom
Título: | A new approach to generating research-quality phenology data: The USA National Phenology Monitoring System
Autores: | Ellen G. Denny; Abraham J. Miller-Rushing; Brian P. Haggerty; Bruce E. Wilson; Jake F. Weltzin; the rest of the USA-NPN Protocol Development Team.
Data: | 2010-07-15
Ano: | 2010
Palavras-chave: | Ecology; Bioinformatics; Earth &amp; Environment.
Resumo: | The USA National Phenology Network (www.usanpn.org) has recently initiated a national effort to encourage people at different levels of expertise&amp;#x2014;from backyard naturalists to professional scientists&amp;#x2014;to observe phenology and contribute to a national database that will be used to greatly improve our understanding of spatio-temporal variation in phenology and associated phenological responses to climate change. Many phenological observation protocols identify speci&amp;#xfb01;c single dates at which individual phenological events are observed, but the scienti&amp;#xfb01;c usefulness of long-term phenological observations can be improved with a more carefully structured protocol. At the USA-NPN we have developed a new approach that directs observers to record each day that they observe an individual plant, and to assess and report the state of speci&amp;#xfb01;c life stages (or phenophases) as occurring or not occurring on that plant for each observation date. Observations of animal phenophases are similarly recorded, although for a species as a whole rather than for a specific individual. Evaluation is phrased in terms of simple, easy-to-understand, questions (e.g. &amp;#x201c;Do you see open &amp;#xfb02;owers?&amp;#x201d;) which makes it appropriate for a broad audience. From this method, a rich dataset of phenological metrics can be extracted, including the duration of a phenophase (e.g. open &amp;#xfb02;owers), the beginning and end points of a phenophase (e.g. traditional phenological events such as &amp;#xfb01;rst &amp;#xfb02;ower and end flowering), multiple distinct occurrences of phenophases within a single growing season (e.g multiple &amp;#xfb02;owering events, common in drought-prone regions), as well as quanti&amp;#xfb01;cation of sampling frequency and observational uncertainties. The system also includes a mechanism for translation of phenophase start and end points into standard traditional phenological events to facilitate comparison of contemporary data collected with this new &amp;#x201c;phenophase status&amp;#x201d; monitoring approach to historical datasets collected with the &amp;#x201c;phenological event&amp;#x201d; monitoring approach. These features greatly enhance the utility of the resulting data for statistical analyses addressing questions such as how phenological events vary in time and space, and in response to global change.
Tipo: | Poster

Identificador:

http://precedings.nature.com/documents/3695/version/2

oai:nature.com:10.1038/npre.2010.3695.2

http://dx.doi.org/10.1038/npre.2010.3695.2

Fonte: | Nature Precedings
Fonte: | Creative Commons Attribution 3.0 License