Database release:

SDF

NATURA 2000 - STANDARD DATA FORM

For Special Protection Areas (SPA),
Proposed Sites for Community Importance (pSCI),
Sites of Community Importance (SCI) and
for Special Areas of Conservation (SAC)

SITE	FR7200717
SITENAME	Zones humides de l'arrière dune du Marensin

1. SITE IDENTIFICATION
2. SITE LOCATION
3. ECOLOGICAL INFORMATION
4. SITE DESCRIPTION
5. SITE PROTECTION STATUS
6. SITE MANAGEMENT
7. MAP OF THE SITE

1. SITE IDENTIFICATION

1.1 Type

1.2 Site code

FR7200717

1.3 Site name

Zones humides de l'arrière dune du Marensin

1.4 First Compilation date

1995-11

1.5 Update date

2015-03

1.6 Respondent:

Name/Organisation:	Ministère de la Transition écologique - DGALN/DEB/SDET/ET5
Address:
Email:	en3.en.deb.dgaln@developpement-durable.gouv.fr

1.7 Site indication and designation / classification dates

Date site proposed as SCI:	2003-07
Date site confirmed as SCI:	2017-12
Date site designated as SAC:	2021-01
National legal reference of SAC designation:	https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000043092560

Explanation(s):

Mise à jour suite validation du Docob (2012)

2. SITE LOCATION

2.1 Site-centre location [decimal degrees]:

Longitude:	-1.347400
Latitude:	43.758610

2.2 Area [ha]

1616.0000

2.3 Marine area [%]

0.0000

2.4 Sitelength [km] (optional):

No information provided

2.5 Administrative region code and name

NUTS level 2 code	Region Name
FR61	Aquitaine

2.6 Biogeographical Region(s)

Atlantic

(100.00 %)

3. ECOLOGICAL INFORMATION

3.1 Habitat types present on the site and assessment for them

Annex I Habitat types						Site assessment
Code	PF	NP	Cover [ha]	Cave [number]	Data quality	A\|B\|C\|D	A\|B\|C
						Representativity	Relative Surface	Conservation	Global
2180			304	0.00	G	B	C	B	B
2190			1	0.00	G	D
3110			4	0.00	G	C	C	C	C
3150			650	0.00	G	A	C	C	B
3260			2	0.00	G	B	C	B	B
4020	X		20	0.00	G	C	C	C	C
6410			1	0.00	M	C	C	C	C
6430			36	0.00	M	B	C	B	C
7110	X		9	0.00	G	B	C	C	B
7120			19	0.00	G	B	C	B	B
7140			10	0.00	M	B	C	C	B
7150			5	0.00	G	B	C	B	B
7210	X		6	0.00	M	B	C	B	B
9190			20	0.00	G	C	C	B	C
91E0	X		19	0.00	G	B	C	C	C

PF: for the habitat types that can have a non-priority as well as a priority form (6210, 7130, 9430) enter "X" in the column PF to indicate the priority form.
NP: in case that a habitat type no longer exists in the site enter: x (optional)
Cover: decimal values can be entered
Caves: for habitat types 8310, 8330 (caves) enter the number of caves if estimated surface is not available.
Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation)

3.2 Species referred to in Article 4 of Directive 2009/147/EC and listed in Annex II of Directive 92/43/EEC and site evaluation for them

Species					Population in the site						Site assessment
G	Code	Scientific Name	S	NP	T	Size		Unit	Cat.	D.qual.	A\|B\|C\|D	A\|B\|C
						Min	Max				Pop.	Con.	Iso.	Glo.
I	1044	Coenagrion mercuriale			p	9	9	localities	R	G	C	C	C	C
I	1071	Coenonympha oedippus			p			i	C	M	B	B	B	B
R	1220	Emys orbicularis			p			i	C	G	C	B	C	B
F	1096	Lampetra planeri			p			i	C	G	C	B	C	B
I	1083	Lucanus cervus			p			i	R	P	D
P	1831	Luronium natans			p			i	V	G	D
M	1355	Lutra lutra			p			i	C	G	C	B	C	B
P	1428	Marsilea quadrifolia			p			i	P	P	B	B	C	B
I	1041	Oxygastra curtisii			p			i	R	G	C	C	C	C
F	1095	Petromyzon marinus			r			i	V	G	D
P	1618	Thorella verticillatinundata			p			i	V	P	D

Group: A = Amphibians, B = Birds, F = Fish, I = Invertebrates, M = Mammals, P = Plants, R = Reptiles
S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
NP: in case that a species is no longer present in the site enter: x (optional)
Type: p = permanent, r = reproducing, c = concentration, w = wintering (for plant and non-migratory species use permanent)
Unit: i = individuals, p = pairs or other units according to the Standard list of population units and codes in accordance with Article 12 and 17 reporting (see reference portal)
Abundance categories (Cat.): C = common, R = rare, V = very rare, P = present - to fill if data are deficient (DD) or in addition to population size information
Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation); VP = 'Very poor' (use this category only, if not even a rough estimation of the population size can be made, in this case the fields for population size can remain empty, but the field "Abundance categories" has to be filled in)

3.3 Other important species of flora and fauna (optional)

Species					Population in the site				Motivation
Group	CODE	Scientific Name	S	NP	Size		Unit	Cat.	Species Annex		Other categories
					Min	Max		C\|R\|V\|P	IV	V	A	B	C	D
F		Anguilla anguilla						R			X		X
F		Esox lucius						R			X
P		Lobelia dortmanna						P			X
P		Trapa natans						P					X

Group: A = Amphibians, B = Birds, F = Fish, Fu = Fungi, I = Invertebrates, L = Lichens, M = Mammals, P = Plants, R = Reptiles
CODE: for Birds, Annex IV and V species the code as provided in the reference portal should be used in addition to the scientific name
S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
NP: in case that a species is no longer present in the site enter: x (optional)
Unit: i = individuals, p = pairs or other units according to the standard list of population units and codes in accordance with Article 12 and 17 reporting, (see reference portal)
Cat.: Abundance categories: C = common, R = rare, V = very rare, P = present
Motivation categories: IV, V: Annex Species (Habitats Directive), A: National Red List data; B: Endemics; C: International Conventions; D: other reasons

4. SITE DESCRIPTION

4.1 General site character

Habitat class	% Cover
N06	49.00
N07	13.00
N08	2.00
N10	3.00
N16	30.00
N17	1.50
N23	1.00
N27	0.50
Total Habitat Cover	100

Other Site Characteristics

Le site se situe sur une vaste plaine sableuse, sans relief saillant jusqu'au cordon dunaire. L'altitude varie de 15-20 m vers l'ouest a plus de 80 m dans la partie la plus orientale. Le site est soumis aux masses d'air humide venant de l'Océan Atlantique et bénéficie de ce fait d'un climat océanique doux et humide. Le secteur est l'un des plus riches en eaux souterraines en France, le sous-sol se trouve traversé par une nappe phréatique libre et continue, souvent très proche de la surface. La nappe des sables est alimentée essentiellement par l'infiltration directe des précipitations. Les étangs côtiers du Marensin se caractérisent par un état avancé d'eutrophisation. Les problématiques des espèces végétales invasives et du comblement sont arrivés a un stade préoccupant vis-a-vis des usages et des activités humaines. Les cours d'eau côtiers drainent, assez mal au demeurant, de petits bassins versants domines par l'activité forestière. Les milieux rivulaires très fragiles supportent mal la pression des activités humaines. La position de bourgs touristiques au plus prés des zones humides et des cours d'eau implique une attention particulière sur les processus d'extension urbaine, même si les zones humides profitent des difficultés à être aménagées. Les activités sylvicoles, agricoles et de loisirs sont présentes sur le site ; en restant attentif celles-ci sont conciliables avec la protection du site et indispensable au développement durable du territoire.

4.2 Quality and importance

Le site s'étend sur 1 616 hectares en une succession de milieux imbriqués et interdépendants : dunes, étangs littoraux et leurs marais et marécages associés, forêts-galeries, tourbières. Situé dans le territoire du massif forestier gascon caractérisé par son sol sableux et sa forêt de pins maritimes, ce site est boisé à plus de 40 %. Plusieurs espèces animales rares trouvent un biotope favorable dans ces différents habitats. C'est le cas de la Cistude d'Europe, du Vison d'Europe, de la Cordulie à corps fin. Le site accueille une avifaune riche tant en halte migratoire que pour la nidification. Au printemps, le Blongios nain, un petit héron d'une trentaine de centimètres de haut en fort déclin en France et en Europe, revient d'Afrique pour nicher dans les marais bordant les étangs. En ce qui concerne la flore, le Flûteau nageant est également une espèce emblématique du site. Ces zones humides procurent au territoire son identité paysagère et socioculturelle. Enfin, les étangs accueillent les activités traditionnelles comme la chasse ou la pêche, et également les loisirs de plein air et sont le lieu de développement d'activités touristiques.

4.3 Threats, pressures and activities with impacts on the site

The most important impacts and activities with high effect on the site

Negative Impacts
Rank	Threats and pressures [code]	Pollution (optional) [code]	inside/outside [i\|o\|b]
M	A04.03		b
M	B01		b
H	B02		b
M	D01		b
H	G01		b
H	H01		b
H	J02.05		b
M	J02.11		b
H	J02.13		i
M	K02		b

Positive Impacts
Rank	Activities, management [code]	Pollution (optional) [code]	inside/outside [i\|o\|b]
H	A03.02		i
H	A04.02		i
H	J01.02		b
M	J03.03		b

Rank: H = high, M = medium, L = low
Pollution: N = Nitrogen input, P = Phosphor/Phosphate input, A = Acid input/acidification,
T = toxic inorganic chemicals, O = toxic organic chemicals, X = Mixed pollutions
i = inside, o = outside, b = both

4.4 Ownership (optional)

Type		[%]
Public	National/Federal	0
	State/Province	0
	Local/Municipal	0
	Any Public	0
Joint or Co-Ownership		0
Private		0
Unknown		0
sum		100

4.5 Documentation (optional)

DOCOB des dunes du Marensin - Marensin Nature

5. SITE PROTECTION STATUS

5.1 Designation types at national and regional level (optional):

Code	Cover [%]
FR03	3.00
FR12	1.00
FR13	98.00
FR20	1.00
FR21	1.00
FR24	70.00
FR32	1.00
IN01	3.00

5.2 Relation of the described site with other sites (optional):

Designated at national or regional level:

Type code	Site name	Type	Cover [%]
FR03	Etang Noir	*	3.00

Designated at international level:

Type	Site name	Type	Cover [%]
biogenetic	ETANG NOIR	*	3.00

5.3 Site designation (optional)

No information provided

6. SITE MANAGEMENT

6.1 Body(ies) responsible for the site management:

Organisation:	Association Marensin nature
Address:
Email:	accueil@landes.chambagri.fr

6.2 Management Plan(s):

An actual management plan does exist:

X	Yes	Name: Docob Natura 2000 des zones humides du Marensin Link: http://fr.calameo.com/read/000161556718f34fdc237
	No, but in preparation
	No

6.3 Conservation measures (optional)

No information provided

TABLE OF CONTENTS

1. SITE IDENTIFICATION

1.1 Type

1.2 Site code

1.3 Site name

1.4 First Compilation date

1.5 Update date

1.6 Respondent:

1.7 Site indication and designation / classification dates

2. SITE LOCATION

2.1 Site-centre location [decimal degrees]:

2.2 Area [ha]

2.3 Marine area [%]

2.4 Sitelength [km] (optional):

2.5 Administrative region code and name

2.6 Biogeographical Region(s)

3. ECOLOGICAL INFORMATION

3.1 Habitat types present on the site and assessment for them

3.2 Species referred to in Article 4 of Directive 2009/147/EC and listed in Annex II of Directive 92/43/EEC and site evaluation for them

3.3 Other important species of flora and fauna (optional)

Species

Population in the site

Motivation

4. SITE DESCRIPTION

4.1 General site character

Total Habitat Cover

Other Site Characteristics

4.2 Quality and importance

4.3 Threats, pressures and activities with impacts on the site

4.4 Ownership (optional)

4.5 Documentation (optional)

5. SITE PROTECTION STATUS

5.1 Designation types at national and regional level (optional):

5.2 Relation of the described site with other sites (optional):

5.3 Site designation (optional)

6. SITE MANAGEMENT

6.1 Body(ies) responsible for the site management:

6.2 Management Plan(s):

6.3 Conservation measures (optional)

7. MAP OF THE SITE

SITE DISPLAY