{"id":1012016,"date":"2026-02-26T13:07:44","date_gmt":"2026-02-26T12:07:44","guid":{"rendered":"https:\/\/new.obsnev.es\/?post_type=protocolos&p=1012016"},"modified":"2026-02-27T09:36:54","modified_gmt":"2026-02-27T08:36:54","slug":"caracterizacion-detallada-de-formaciones-vegetales-mediante-ortofotografia","status":"publish","type":"protocolos","link":"https:\/\/obsnev.es\/en\/protocolos\/caracterizacion-detallada-de-formaciones-vegetales-mediante-ortofotografia\/","title":{"rendered":"Detailed characterization of plant formations using orthophotography"},"content":{"rendered":"
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Aims<\/h3>
  • To provide a detailed characterization of the changes in the main plant formations of Sierra Nevada.<\/li>
  • To quantify the temporal variations in density and degree of coverage of the main species in relation to elevation.<\/li><\/ul><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Method and effort<\/h3>

    The detailed delineation of plant formations is superimposed over aerial orthorectified photographs of different dates (working scale 1:5,000-1:8,000). Certain zones within the distribution area of the formation are selected to make comparisons between dates, considering the availability of data as well as their quality. In these preselected areas, a series of 1-ha circular plots are randomly distributed. The individuals of the main species are counted and the coverage of this species estimated for the different dates.<\/p>

    In addition, a series of transects are laid out by photointerpretation according to an altitudinal gradient. Over each transect, tangential circles (the size is c. 30 m in radius) are drawn covering the distribution range of the oak forests and juniper thickets (1100 m to 2700 m). The working scale varies between 1:3,000 and 1:5,000. In these plots, the photointerpretation is made recording the variables of interest for each date.<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Periodicity<\/h3>

    At present, there are photos of Sierra Nevada of sufficient quality for the dates: 1956, 1977, 1984, 1998, 2001, 2004, 2007, and 2009.<\/p><\/div><\/div><\/div><\/div>

    References<\/h3>

    Allen, C.D. y Breshears, D.D. 1998. Drought-induced shift of a forest-woodland ecotone: Rapid landscape response to climate variation. PNAS, 95 (25): 14839\u201314842
    Navarro Gonz\u00e1lez, I. y Bonet Garc\u00eda, F.J. 2010. Vegetation cover changes in Sierra Nevada mountains (Spain) during the past 50 years and relation to land use and climate change. p. 53. En: 2\u00aa International GMBA-DIVERSITAS Conference \u201cFunctional significance of mountain biodiversity\u201d. Chandolin, Switzerland. 27 \u2013 30 Jul. Conference abstracts.
    Sanz-Elorza, M., Dana, E., Gonz\u00e1lez, A. y Sobrino, E. 2003. Changes in the high-mountain vegetation of the central Iberian Peninsula as a probable sign of global warming. Ann. Bot., 92:273\u2013280.<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"featured_media":1012107,"template":"","meta":{"_acf_changed":false},"ambito-tematico":[345],"class_list":["post-1012016","protocolos","type-protocolos","status-publish","has-post-thumbnail","hentry","ambito-tematico-reconstruccion-del-pasado"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/protocolos\/1012016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/protocolos"}],"about":[{"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/types\/protocolos"}],"version-history":[{"count":5,"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/protocolos\/1012016\/revisions"}],"predecessor-version":[{"id":1012077,"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/protocolos\/1012016\/revisions\/1012077"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/media\/1012107"}],"wp:attachment":[{"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/media?parent=1012016"}],"wp:term":[{"taxonomy":"ambito-tematico","embeddable":true,"href":"https:\/\/obsnev.es\/en\/wp-json\/wp\/v2\/ambito-tematico?post=1012016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}