1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du projet qui a facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Catastrophic shifts in drylands (EU-CASCADE)

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Centro de Estudios Ambientales del Mediterraneo (CEAM) - Espagne

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Quand les données ont-elles été compilées (sur le terrain)?

26/04/2013

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

1.4 Déclaration sur la durabilité de la Technologie décrite

Est-ce que la Technologie décrite ici pose problème par rapport à la dégradation des terres, de telle sorte qu'elle ne peut pas être déclarée comme étant une technologie de gestion durable des terres?

Non

2.1 Courte description de la Technologie

Définition de la Technologie:

The combination of clearing of fire-prone seeder species and planting of more fire resistant resprouter species directs the vegetation to later successional stages which increases the resilience to fires.

2.2 Description détaillée de la Technologie

Description:

The forests and shrublands in Ayora experienced a series of disturbances in the past (such as deforestation and land use), which resulted in the degradation of the vegetation and the reduction of the resilience to fires. At present, there is a high fire incidence. Post-fire landscapes regenerated with a high and continuous fuel accumulation with few native resprouter species. Therefore appropriate vegetation management is crucial.
For management the major goals are to reduce the fuel load and its continuity and to increase the resilience of the vegetation to fires. Within this experiment carried out by CEAM (Centro de Estudios Ambientales del Mediterráneo, University of Valencia) different fuel management techniques were examined. They selected three study sites (Morera, Roñoso, Gachas) with a similar history of land use, vegetation composition, soil characteristics, and a typical post-fire scenario whith scarce occurrence of resprouter species. In each site, four plots were established to test the effect of the following management techniques: 1) control (no action), 2) clearing, 3) planting (within the shrubland) and 4) the combination of clearing and planting.

The main purpose of this experiment was to find out which management technique is the most appropriate to prevent fires and it was shown that the combination of selective clearing of fire-prone shrubs (fuel control) and planting of more resistant resprouter species can increase the resilience to fires and is therefore a suitable management practice. Compared to the other management techniques, there are some advantages. Clearing the vegetation (either by hand or mechanically) reduces the fire risk and enhances seedling establishment and growth. Furthermore, the cleared vegetation is chipped and applied in-situ as mulch, which protects the soil from erosion, reduces soil temperature and moisture loss, and enhances carbon conservation. Additionnally, selective clearing allows to preserve desired species and by planting resprouter species the natural processes can be accelerated. Once established, resprouter species persist for a long time which promotes an increase of the vegetation resilience.
In this documentation, only the combination of clearing and planting is evaluated since this action is considered as the most appropriate management practice.

In each study site, the experimental area covered about 5000m2 (3 plots of 1000m2 each, one plot of 2000m2). To test the effect of the combination of clearing and planting, a clearing machine was used to clear a plot of 1000 m2 in all three sites. The few resprouting individuals such as Juniperus oxycedrus and Quercus ilex and also some seeder trees such as Pinus halepensis and Pinus pinaster were left standing. The planting holes (0.35 m2) were created with a tractor using a backhoe. The slash and brush chips generated by the clearing were reused in the planting holes as mulch which resulted in ecological benefits.
In February 2003, native resprouters of late successional stages with a low amount of dead fuel were planted, such as Quercus ilex, Rhamnus alaternus and Pistacia lentiscus, all protected by a plastic tree shelter to prevent browsing.
The seedlings were grown for 8 months in a nursery in Santa Faz (Alicante) and then transferred to a nursery in La Hunde (Ayora) one month before planting. The Regional Forest Services of Valencia provided seeds as well.

The region of Ayora is mountainous with a dry subhumid climate (~380 mm annual rainfall). The risk of fire incidence is at its highest from June to September when there are adverse conditions like drought, high temperatures and strong winds (mainly the winds coming from central Spain, called “poniente”). The population density is very low and there are only few job opportunities (e.g. marginal agriculture, grazing, hunting, beekeeping). Most of the inhabitants work in the nuclear power plant. Forest management could be a source for jobs.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a moins de 10 ans (récemment)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• au cours d'expérimentations / de recherches

Commentaires (type de projet, etc.) :

This research was carried out in the framework of the SPREAD project funded by the European Commission (2002-2005), in the year 2003.

3.1 Principal(aux) objectif(s) de la Technologie

• réduire, prévenir, restaurer les terres dégradées
• réduire les risques de catastrophes

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): In Spain the prevalent dense shrublands (dominated by seeder species), which resulted from agricultural land abandonment and fire occurrence, contain a high fire risk because of both the high fuel loads and their continuity. Resprouter species have been removed in the past and are therefore scarce, whereas seeder species are abundant and increase the risk of fires.

Selective felling of (semi-) natural forests: As a management practice. The forest should be cut more frequently since there is a huge amount of fuel but there is no money for management.
Plantation forestry: Almost the whole forest in this region was planted. Furthermore, they also planted different species as a management practice.

3.3 Informations complémentaires sur l'utilisation des terres

Nombre de période de croissance par an: :

• 1

3.4 Groupe de GDT auquel appartient la Technologie

• gestion des forêts naturelles et semi-naturelles
• gestion des plantations forestières

3.5 Diffusion de la Technologie

Spécifiez la diffusion de la Technologie:

• répartie uniformément sur une zone

Si la Technologie est uniformément répartie sur une zone, indiquez la superficie couverte approximative:

• < 0,1 km2 (10 ha)

Commentaires:

Total area covered by the SLM Technology is 0.015 m2.
The experiment was done in three different gorseland test sites with similar history of land use, vegetation composition and structure, and soil characteristics – Morera, Roñoso, Gachas. In each site, there were 4 plots (control, clearing, planting, clearing and planting). Each site has an area of approximately 5000 m2 (total area: 5000 x 3 = 15’000 m2)

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Specification of other vegetative measures: Introduction of fire resistant species
Type of vegetative measures: aligned: -linear

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (Deforestation in the past (removal of resprouter species), land abandonment, uncontrolled growth of fire prone vegetation, afforestations, forest fires), other human induced causes (specify) (change of vegetation composition to fire-prone shrubland), population pressure (Vast areas were deforested in the past for agriculture, important key species were removed. After land abandonment there was a lack of management strategies.), poverty / wealth (The current economic crisis in Spain leads to a lack of investment in forest management, therefore only a minor part of forests is managed), labour availability (In the past there was outmigration from the region to the big cities and therefore there was a lack of management)
Secondary causes of degradation: change of seasonal rainfall (More variability in precipitation leads to a higher risk of fires), droughts (more fires during droughts), land tenure (The state is only allowed to apply management practices in public forest. The private forest is often not managed which increases the risk of fires and the resulting degradation), inputs and infrastructure: (roads, markets, distribution of water points, other, …) (There were big fires in the past because of the lack of fire extinction media like water ponds, streets, transport media (this has been improved now)), education, access to knowledge and support services (Loss of knowledge, important for today’s fires: People (especially from the cities) are not aware anymore of the risk of fire. In the past people lived with the risk and knew how to prevent fires.), governance / institutional (Law to induce implementation of conservation interventions (ley forestal 3/1993). Before this law was implemented there were less conservation practices and therefore a higher fire risk)

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• prévenir la dégradation des terres
• réduire la dégradation des terres

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

On the left, the situation before management is illustrated. Dense shrublands contain a high fire risk due to their high fuel amount and continuity. On the right, the situation after management is shown. The combination of selective clearing of fire-prone seeder species and planting of more fire resistant resprouter species (illustrated by tree shelters in the drawing) promotes shrubland resilience to fires.
Location: Ayora. Valencia, Spain
Date: 13-12-2013

Technical knowledge required for field staff / advisors: high (The experiment was carried out by scientists (biologists) with a high technical knowledge.)
Technical knowledge required for land users: low (In case of upscaling this experiment to a local or regional level, the work could be carried out by land users with a low technical knowledge, with technical support of scientists and forest agents)

Main technical functions: control of fires, reduction of dry material (fuel for wildfires), Promotion of vegetation species and varieties (more fire resistant vegetation composition)
Secondary technical functions: control of raindrop splash, increase in nutrient availability (supply, recycling,…), increase / maintain water stored in soil

Aligned: -linear
Vegetative material: T : trees / shrubs
Number of plants per (ha): 1000
Vertical interval between rows / strips / blocks (m): <2m
Spacing between rows / strips / blocks (m): <2m
Vertical interval within rows / strips / blocks (m): <2m
Width within rows / strips / blocks (m): <2m

Vegetative measure: Selective vegetation clearing
Vegetative material: T : trees / shrubs
Trees/ shrubs species: Planted species: Pistacia lentiscus, Quercus ilex and Rhamnus alaternus.
Other species: Removed species: Ulex parviflorus, Rosmarinus officinalis, Cistus albidus

4.3 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

Euro

Indiquer le taux de change du dollars en monnaie locale (si pertinent): 1 USD= :

0,74

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Cutting and chipping (in-situ) trees and shrubs (removed species: ulex parviflorus, rosmarinus officinalis, cistus albidus. Natural regenerated species which are not cleared: pinus halepensis, pinus pinaster, quercus ilex, juniperus oxycedrus)	Végétale	autumn/winter (when the vegetation activity is slowed down)
2.	Planting (planted species: pistacia lentiscus, quercus ilex, rhamnus alaternus)	Végétale	autumn/winter (february 2003)

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Equipements	machine use	ha	1,0	3089,0	3089,0
Equipements	tree shelters	ha	1,0	945,0	945,0
Matériel végétal	seedlings	ha	1,0	4587,0	4587,0
Coût total de mise en place de la Technologie					8621,0

Commentaires:

Duration of establishment phase: 0.5 month(s)

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	There is no maintenance, but in case of maintenance they would do selective clearings (using machines)	Végétale	all 5-7 years in autumn/winter

4.7 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Equipements	machine use	ha	1,0	446,0	446,0
Coût total d'entretien de la Technologie					446,0

Commentaires:

The costs were calculated for the application of the technology (combination of clearing and planting) on one hectare. The costs can vary depending on the amount of vegetation which has to be cleared (site specific). The costs of the clearing amount to 1090 Euro per ha (1470 Dollar). The costs of the plantation (both labour and machines) are approximately 5300 Euro per hectare (7150 Dollar). But it should also be noted that the application of the selective clearing and planting on a vast continuous area is not the aim of this technology, but rather to apply the treatments on some selected spots to reduce the continuity of fire-prone seeder species and to increase the probability of dispersal of resprouter species (e.g. by birds). Therefore the costs would be lower than indicated here.
The currency rate (Euro-Dollar) was calculated on November 16th, 2013.

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

Slope (if the slope is steep, the work is much more difficult and takes more time), distance from a street (people can work less in a day if they have to walk far to clear/plant), vegetation density (it takes more time to clear a densely vegetated area).

5.1 Climat

5.2 Topographie

5.3 Sols

5.4 Disponibilité et qualité de l'eau

5.5 Biodiversité

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Difference in the involvement of women and men: The experiment was done by biologists, all of them were men.
Population density: < 10 persons/km2
Annual population growth: negative

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• état
• individu, avec titre de propriété

Droits d’utilisation des terres:

• individuel

• public/open access but organised (e.g. wood, hunting)

• public/open access but organised (e.g. wood, hunting)

Commentaires:

There is some public land, controlled by the state. But there is also some private land. The access to the public land is open but organized. Permission is needed from the government to cut trees, to build a house or to hunt. There are some private hunting areas for which the hunting association has to pay a fee.

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Cycle de l'eau/ ruissellement

Sols

Biodiversité: végétale, animale

Réduction des risques de catastrophe et des risques climatiques

Autres impacts écologiques

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Type de changements/ extrêmes climatiques	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	pas bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	bien
tempête de vent locale	bien

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	bien

Catastrophes hydrologiques

	Comment la Technologie fait-elle face à cela?
inondation générale (rivière)	bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
temperature decrease, snow, frost	pas bien

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

Commentaires:

Short term returns are slightly negative because the management practice is expensive and until the trees reach a mature state, there are not many returns (in terms of wood and biomass). In the long term this management practice has very positive results because it increases the resilience to fires and can be seen as a sustainable management of fire-prone areas. Additionally, wood and biomass can be extracted. The idea is not to apply any maintenance in the first 10 years after the establishment.

6.5 Adoption de la Technologie

Commentaires:

There is no adoption trend since this was only an experiment, but maybe there will be the possibility to upscale this technology in a regional project.

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
Almost all villagers prefer a managed forest. It has a high aesthetic and recreational value. Through the application of this technology the awareness of the risk of wildfires would probably increase.
Shepherds and farmers benefit from forest clearings. There are more young grasses in the forest which provides fodder for livestock. Also wild animals benefit from this food supply which in turn hinders them to destroy cultivated fields of the farmers.

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
After fires, the natural landscape regenerated with a high and continuous fuel amount and a scarce occurrence of native resprouter species. It is crucial to apply management actions to reduce the fire hazard. The experiment demonstrated that it is possible to accelerate the post-fire vegetation response (which promotes ecosystem resilience).
Planting of resprouting species in post-fire areas can accelerate the natural process. Clearing of the vegetation reduces the fire risk, but this treatment may also enhance seedling establishment and growth.
The slash and brush chips generated by the clearings can be reused in the planting holes. This mulch layer protects the soil surface and reduces both the soil surface temperature and the germination of competing seeds while increasing the soil moisture content, especially in the driest periods.
The combination of clearing and planting resprouting species seems to be an appropriate option for managing these areas because, once established, the resprouting species persist for a long time and lead to an increase of the ecosystem resilience.
Social and economic benefits for the locals. Especially during the economic crisis the forest management is an important source for jobs.

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
The management activities are expensive and labour-intensive. The state does not invest much money in prevention of forest fires but focuses more on fire extinction.	More investment in prevention of forest fires is required and this management practice could increase the ecosystem resilience against fires in the long term in a sustainable way. This would also generate jobs. This technology implies a combination of techniques (selective clearing and planting). Costs may be reduced by implementing individual techniques but positive results may also be reduced.
The technology could result in a reduction of the animal production because grazing should be restricted after planting to ensure the growth of the planted seedlings.	Since the technology would not be applied over vast areas but only locally on some plots, the fodder supply would probably still cover the needs of the animals.
Depending on the site, some soil may be exposed to erosion due to mechanical clearing.	Mulching with brush chipping can minimize or even solve this problem.
After clearing, an increase in wind velocity might occur.	The planted trees will grow which will again result in the reduction of this problem.

7.1 Méthodes/ sources d'information

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

Valdecantos, A., Baeza, M.J., Vallejo, V.R. (2009): Vegetation management for promoting ecosystem resilience in fire-prone Mediterranean shrublands. Restoration Ecology 17, 3: 414-421.