Multi Level Monitoring System for Cork Oak (Quercus Suber L.) Stands in Portugal

Ribeiro, N. A.; Gonçalves, Ana Cristina; Dias, Susana; Afonso, Tarcisio; Ferreira, Alfredo Gonçalves

doi:10.1007/978-94-017-0649-0_29

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…It is arbitrarily determined by the decision maker based on the slope (driver for erosion control) and the grazing needs of animal livestock. Usually in slopes above 15% the lower threshold for crown cover should be 56% (Ribeiro et al, 2003a). Below slope of 15%, all combinations for crown cover in the range between 25% and 100% are possible.…”

Section: Resultsmentioning

confidence: 99%

“…CORKFITS consists of sub-models (cork, stem, tree height and crown), cork production models and mortality models (Ribeiro et al, 2003a, 2003b, 2006.…”

Section: Methodsmentioning

confidence: 99%

“…Cork oak woodlands system resilience is a function of specific stand structures and densities that are supplied with new trees to compensate the natural rates of mortality permitting the maintenance of a stable crown cover (Ribeiro et al, 2003a(Ribeiro et al, , 2006(Ribeiro et al, , 2010.…”

Section: Introductionmentioning

confidence: 99%

“…) as well as at the tree level (growth, cork production, intensity of debark, crown pruning, etc.) (Ribeiro et al, 2003a). The decision model, that composes the model called ECCORK, includes ecological indices (vegetation and animal biodiversity), management risk indices (soil erosion and fire hazard) and economical indices (cork production, cattle pro-duction, carbon sequestration, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Optimal Regeneration Regime under Continuous Crown Cover Requirements in Cork Oak Woodlands

Ribeiro

Surový

Yoshimoto

2012

FORMATH

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Abstract:In the present work the cork oak tree spatial growth simulator CORKFITS is used to create candidate scenarios for generating a large set of regeneration regimes combining both time and intensity factors with the individual tree spatial information. An optimal regeneration regime under continuous crown cover requirements is sought by applying a dynamic programming algorithm. It is shown that the crown cover constraint influences the total cork production potential in a negative way. The target cover constraint of 50% decreases the cork production by 66% from the potential in 40 years in our mature plot, and approximately 43% in our young plot. Higher crown cover constraint of 70% decreases the potential cork production approximately by 54% in the mature plot and does not have any influence on the younger plot. The observed losses in cork production in relation with the potential with the crown cover constrains need to be compensated economically by the higher availability of growing space for the grazing and livestock part of the montado/dehesa production system.

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Section: Resultsmentioning

confidence: 99%

“…CORKFITS consists of sub-models (cork, stem, tree height and crown), cork production models and mortality models (Ribeiro et al, 2003a, 2003b, 2006.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal Regeneration Regime under Continuous Crown Cover Requirements in Cork Oak Woodlands

Ribeiro

Surový

Yoshimoto

2012

FORMATH

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Method for evaluation of coarse cork oak root system by means of digital imaging

et al. 2011

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Digital imaging is becoming a powerful tool for data storage and information retrieval. Image comparison and similarity evaluation has become part of the information market and it is today a common part of, for example, web search engines. The cork oak tree (Quercus suber L.), the dominant species of the 'montado' woodland system is, due to its cultural and socio-economic value, protected by law that prevents extensive destructive studies on an essential part of the tree-the root. Especially in the Mediterranean zone, where the water is the limiting growth factor, the root development studies are of significant interest. In this work we present a method of using digital images for cork oak coarse root systems-evaluation by means of digital imaging. Acquired images of structural roots are processed automatically to prevent subjective decisions by the human observer. The performance of the method, its potential for semantic retrieval and similarity assessment is demonstrated, having as example eight young cork oak root systems, and critical issues for evaluation and conclusion-making, are discussed.

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Introducing the montado, the cork and holm oak agroforestry system of Southern Portugal

2011

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The Portuguese montado is an agro-silvo pastoral system quite similar to the dehesa in Spain, and covering in Portugal most of the Southern region of the country, Alentejo. The trees in the montado are cork oh holm oak, and the system is mostly acknowledged due to the cork production, but also due to its singular savanna like land cover pattern, its multiple and complementary productions, the support of a diversity of ecosystems services and its biodiversity. The present special issue covers the diversity of components of the montado and of perspectives required to understand and assess the functioning of the system. This Editorial introduces the montado system, describes its extension and similarities to the dehesa in Spain, and addresses the multiple productions and externalities of the montado. It also refers to the several components of the system. It focus on the uniqueness and values of this system, stressing its potential and threats, and the requirements for integrated knowledge production. In the end of the Editorial, each one of the papers that compose the special issue are presented.

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Multi Level Monitoring System for Cork Oak (Quercus Suber L.) Stands in Portugal

Cited by 5 publications

References 5 publications

Optimal Regeneration Regime under Continuous Crown Cover Requirements in Cork Oak Woodlands

Optimal Regeneration Regime under Continuous Crown Cover Requirements in Cork Oak Woodlands

Method for evaluation of coarse cork oak root system by means of digital imaging

Introducing the montado, the cork and holm oak agroforestry system of Southern Portugal

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