Grands Causses
IUCN VRegional Nature Park · 1995
3 807 km²
Department · FRA
Lozère
France
CfbTemperate, no dry season, warm summer(75 %)
Species observed
10 693
Observations
1 313 784
Area
5 175,2km²
Ecological tissue
Sample of 45 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique
Indicateurs du tissu écologique
Tissu écologique de Lozère : 42 espèces + 3 bulles famille, 68 interactions GloBI documentées sur 8 types (connectance 6.9%, filtre Serrano α=0.2). Les 3 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Espèces affichées
45
Interactions affichées
68
Connectance
0.069
Patrimoniales
0
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
10 693 distinct species · 1 313 784 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
8,3°C
Annual rain
1 233mm
Warmest m°
21,9°C
Coldest m°
-2,7°C
Elevation: 1 023 m on average (min 271 m, max 1 625 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
8,3°C
Annual rain
1 233mm
Warmest month
21,9°C
Coldest month
-2,7°C
Mean alt.
1 023m
Min
271m
Max
1 625m
Std. dev.
223m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(75 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,5
Org. C
55,1g/kg
Clay
26,0%
Sand
36,5%
Silt
37,5%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,4
Org. C
81,3g/kg
Clay
24,9%
Sand
37,1%
Silt
38,1%
5–15 cm
pH H₂O
6,5
Org. C
51,5g/kg
Clay
24,8%
Sand
37,2%
Silt
38,0%
15–30 cm
pH H₂O
6,5
Org. C
32,7g/kg
Clay
28,2%
Sand
35,2%
Silt
36,6%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest41.6%
Crops24.2%
Built-up0.3%
Bare soil1.6%
Other (grassland, water…)32.3%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology23 basins · 4 lakes · 100 rivers
Hydrology metrics for this exact territory
Stream length here
1 127,0km
Lake surface here
11,62km²
Basins crossed
23
Max stream order
4
Max drainage
2 621km²
Discharge in basins
96,8m³/s
Mean precip.
810mm/an
Mean T°
8,6°C
Moisture idx
-0,03
Max snow
22%
Mean runoff
519mm/an
Mean elev. (basins)
949m
Watersheds crossing here
- Bassin du Tarnsub-area948,2 km²overlap944.03 km²18%
- Bassin du Lotsub-area622,5 km²overlap623.87 km²12%
- Bassin de la Colagnesub-area462,1 km²overlap463.11 km²9%
- Bassin du Chapeaurouxsub-area383,9 km²overlap375.79 km²7%
- Bassin de l'Alzonsub-area1 992,4 km²overlap366.10 km²7%
- Bassin de l'Ardèchesub-area2 393,5 km²overlap326.49 km²6%
- Bassin du Bèssub-area431,2 km²overlap319.87 km²6%
- Bassin de la Truyèresub-area472,3 km²overlap293.15 km²6%
- Bassin du Lotsub-area1 033,3 km²overlap273.96 km²5%
14 more basinssorted by overlap
- Bassin de la Truyèresub-area236,4 km²overlap236.94 km²5%
- Bassin de l'Alliersub-area516,9 km²overlap226.62 km²4%
- Bassin de la Rimeizesub-area207,4 km²overlap207.87 km²4%
- Bassin de la Jontesub-area220,1 km²overlap181.75 km²4%
- Bassin de l'Ancesub-area233,1 km²overlap88.65 km²2%
- Basin #04700sub-area77,8 km²overlap76.67 km²1%
- Bassin de la Cèzesub-area1 357,3 km²overlap72.35 km²1%
- Basin #04520sub-area36,8 km²overlap36.90 km²1%
- Bassin de l'Aveyronsub-area1 527,6 km²overlap29.58 km²1%
- Bassin de la Desgessub-area550,1 km²overlap21.97 km²0%
- Bassin du Tarnsub-area240,4 km²overlap4.11 km²0%
- Bassin de l'Héraultsub-area2 621,2 km²overlap3.41 km²0%
- Bassin de la Dourbiesub-area664,3 km²overlap2.02 km²0%
- Bassin de l'Alliersub-area153,6 km²overlap0.03 km²0%
Lakes (4, top by area)
Rivers / streams (100, ord ≥ 4)
- Le Tarnord 6len here97.33 km27%total364 km
- La Truyèreord 4len here72.56 km36%total200 km
- Le Lotord 5len here50.08 km13%total398 km
- Le Bèsord 3len here44.20 km74%total59 km
- La Colagneord 3len here37.01 km100%total37 km
- L'Allierord 5len here30.58 km9%total351 km
- Le Chapeaurouxord 3len here29.45 km100%total29 km
- Le Chassezacord 3len here29.34 km66%total44 km
- Le Tarnonord 3len here27.96 km100%total28 km
- La Rimeizeord 3len here26.08 km100%total26 km
- Ruisseau de Doulouord 4len here20.78 km100%total21 km
- La Jonteord 2len here20.78 km77%total27 km
88 more river segmentssorted by Strahler order + length
- La Crueizeord 2len here18.38 km100%total18 km
- La Mimenteord 3len here16.17 km100%total16 km
- Le Gardon d'Alèsord 4len here15.55 km42%total37 km
- Le Lançonord 1len here13.95 km100%total14 km
- L'Anceord 3len here13.44 km17%total81 km
- La Clamouseord 2len here13.26 km100%total13 km
- Le Triadouord 1len here13.11 km100%total13 km
- La Biourièreord 2len here11.88 km100%total12 km
- Valat del Bèsord 1len here11.70 km100%total12 km
- La Bédauleord 2len here11.69 km100%total12 km
- Ruisseau du Coulagnetord 2len here11.18 km100%total11 km
- Le Grandrieuord 2len here10.43 km100%total10 km
- Le Gardon de Sainte-Croixord 2len here10.23 km100%total10 km
- La Limagnoleord 2len here10.18 km100%total10 km
- Le Piouord 1len here9.89 km100%total10 km
- L'Altierord 2len here9.89 km100%total10 km
- Ruisseau des Crosesord 1len here9.78 km100%total10 km
- Ruisseau de la Boutaresseord 2len here9.77 km100%total10 km
- Ruisseau de Salliensord 3len here9.77 km100%total10 km
- Ruisseau de la Clamouseord 3len here9.55 km100%total10 km
- Ruisseau des Chèvresord 2len here9.15 km100%total9 km
- Valat de Pébénorgueord 2len here8.99 km100%total9 km
- Ruisseau de Rechauvetord 2len here8.94 km100%total9 km
- Ruisseau des Rebaudesord 3len here8.71 km100%total9 km
- Ruisseau de Merdaricord 1len here8.69 km100%total9 km
- L'Urugneord 3len here8.68 km100%total9 km
- Ravin des Bastidesord 2len here8.53 km96%total9 km
- Rieucros d'Abaïsseord 3len here8.14 km100%total8 km
- Ruisseau de la Vaysseord 2len here7.83 km100%total8 km
- Le Béthuzonord 1len here7.75 km100%total8 km
- La Batailleord 2len here7.52 km100%total8 km
- Valat de Pracigalord 1len here7.51 km100%total8 km
- Le Gardon de Saint-Germainord 2len here7.31 km100%total7 km
- Ruisseau de la Cigaleord 1len here7.29 km100%total7 km
- Le Bouissetord 1len here7.09 km100%total7 km
- Ruisseau de l'Esclancideord 2len here6.94 km100%total7 km
- Ruisseau des Lichèresord 1len here6.87 km100%total7 km
- Ruisseau de Chardonnetord 1len here6.75 km100%total7 km
- Ravin de l'Aigleord 2len here6.73 km100%total7 km
- Le Doulounetord 1len here6.64 km100%total7 km
- Valat de Sinièresord 2len here6.63 km100%total7 km
- Ravin du Léchasord 2len here6.63 km100%total7 km
- Valat de la Crouxord 1len here6.58 km100%total7 km
- Ruisseau de Malavalord 1len here6.46 km55%total12 km
- Ruisseau de Runesord 3len here6.34 km100%total6 km
- Ruisseau des Lavagnesord 1len here6.30 km100%total6 km
- Le Gardon de Mialetord 3len here6.27 km35%total18 km
- Le Chapouilletord 2len here6.20 km100%total6 km
- Ruisseau de Pessadesord 1len here6.13 km100%total6 km
- Ruisseau de Galastreord 1len here6.12 km100%total6 km
- Ruisseau de Grosfouord 1len here6.09 km100%total6 km
- Ruisseau de Malzacord 2len here5.94 km100%total6 km
- Le Donozauord 1len here5.89 km100%total6 km
- Ruisseau de Merdaricord 1len here5.80 km100%total6 km
- Le Briançonord 2len here5.73 km100%total6 km
- La Jourdaneord 1len here5.51 km100%total6 km
- Las Cantaguesord 3len here5.42 km77%total7 km
- Ruisseau de Nasbinalsord 1len here5.39 km100%total5 km
- Ruisseau de Mialanetteord 1len here5.32 km100%total5 km
- Le Dourdonord 1len here5.32 km100%total5 km
- La Ginèseord 2len here5.30 km100%total5 km
- Le Luechord 2len here5.16 km41%total12 km
- Le Gardonord 4len here4.98 km15%total33 km
- Valat Pradelord 2len here4.97 km100%total5 km
- Ruisseau de Brionord 1len here4.88 km100%total5 km
- Le Galeizonord 1len here4.86 km51%total9 km
- Ruisseau de la Cabre ou Pascaletord 1len here4.82 km100%total5 km
- La Borneord 3len here4.76 km27%total18 km
- Le Bramontord 2len here4.69 km100%total5 km
- Ruisseau de Rieutortetord 2len here4.69 km100%total5 km
- Ravin du Fournelord 3len here4.65 km62%total8 km
- Ruisseau de Mallevrièreord 1len here4.63 km100%total5 km
- Ruisseau de Font Bernardord 1len here4.59 km100%total5 km
- L'Orsiéretteord 1len here4.41 km100%total4 km
- Gadron Trabassacord 2len here4.40 km100%total4 km
- Le Rioulongord 1len here4.38 km100%total4 km
- Ruisseau de Saint-Saturninord 1len here4.36 km100%total4 km
- Ruisseau de Gourdouseord 1len here4.29 km100%total4 km
- Ruisseau de Fouillouseord 1len here4.25 km100%total4 km
- Ruisseau du Sapetord 1len here4.23 km100%total4 km
- Ruisseau de la Peyradeord 1len here4.12 km100%total4 km
- Ruisseau du Bouchetord 2len here4.11 km100%total4 km
- Ruisseau de l'Altaretord 1len here4.07 km100%total4 km
- Le Gambaïseord 2len here4.00 km100%total4 km
- Ruisseau du Bertaldèsord 2len here3.92 km100%total4 km
- Ruisseau de Bertailord 2len here3.91 km100%total4 km
- Ruisseau du Crosord 2len here3.81 km100%total4 km
- Ruisseau de Combe Sourdeord 1len here3.69 km100%total4 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,2nW
Built-up
25,7%
Pesticides
32,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas51
IUCN Not Reported · 35IUCN IV · 10IUCN V · 4IUCN II · 1IUCN Ia · 1📍 Point sites · 1
Monts D\'Ardèche
IUCN VRegional Nature Park · 2001
2 487 km²
Aubrac
IUCN VRegional Nature Park · 2018
2 205 km²
Cévennes [Aire D\'Adhésion]
IUCN VNational Park - Buffer zone/Area of adhesion · 1970
2 183 km²
Cévennes
IUCN IINational Park - Core Area · 1970
938 km²
Les Cévennes
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2020
915 km²
Complete list51 protected areas
- Grands CaussesRegional Nature ParkIUCN V19953 807 km²
- Monts D\'ArdècheRegional Nature ParkIUCN V20012 487 km²
- AubracRegional Nature ParkIUCN V20182 205 km²
- Cévennes [Aire D\'Adhésion]National Park - Buffer zone/Area of adhesionIUCN V19702 183 km²
- CévennesNational Park - Core AreaIUCN II1970938 km²
- Les CévennesSpecial Protection Area (Birds Directive)IUCN Not Reported2020915 km²
- Haut Val d'AllierSpecial Protection Area (Birds Directive)IUCN Not Reported2018589 km²
- Gorges du Tarn et de la JonteSpecial Protection Area (Birds Directive)IUCN Not Reported2015418 km²
- Plateau de l'AubracSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2017255 km²
- Vallée du Gardon de MialetSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2016234 km²
- Gorges de la TruyèreSpecial Protection Area (Birds Directive)IUCN Not Reported2018216 km²
- Vallée du Gardon de Saint-JeanSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2016190 km²
- Gorges de l'Allier et affluentsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2019160 km²
- Causse Noir et ses cornichesSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2007140 km²
- Hautes vallées de la Cèze et du LuechSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2016127 km²
- Mont LozèreSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2014117 km²
- Massif de l'Aigoual et du LingasSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2016105 km²
- Vallées du Tarn, du Tarnon et de la MimenteSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2016105 km²
- Montagne de la MargerideSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201194 km²
- Vallée du GaleizonSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201686 km²
- Plateau central de l'Aubrac aveyronnaisSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200671 km²
- Causse NoirSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200862 km²
- Causse noirSpecial Protection Area (Birds Directive)IUCN Not Reported200661 km²
- Gorges du Tarn et de la JonteSpecial Protection Area (Birds Directive)IUCN Not Reported202058 km²
- Haute vallée du Lot entre Espalion et Saint-Laurent-d'Olt et gorges de la Truyère, basse vallée du Lot et le GoulSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200857 km²
- ValdonnezSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201450 km²
- Plateau de MontselguesSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200840 km²
- Plateau de CharpalSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201134 km²
- Falaises de Barjac et causse des BlanquetsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported202123 km²
- Sommets du nord MargerideSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201517 km²
- Causse MéjeanSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201613 km²
- Sommets et versants orientaux de la MargerideSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201212 km²
- Allier et ses affluentsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20169 km²
- Gorges de la JonteSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20078 km²
- ferme de la cle des champsLand acquired by a regional conservatory of natural areasIUCN IV20246 km²
- Vallon de l'UrugneSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20066 km²
- Gorges du TarnSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20075 km²
- Gorges du TarnSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20144 km²
- BougèsForest Managed Biological ReserveIUCN IV19924 km²
- Combe des CadesSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20143 km²
- La BrèzeForest Integral Biological ReserveIUCN Ia20061 km²
- serre de guinetLand acquired by a regional conservatory of natural areasIUCN IV20241 km²
- Stations À Bouleau Nain De MargerideBiotope Protection OrderIUCN IV19841 km²
- montboisier ouestLand acquired by a regional conservatory of natural areasIUCN IV20240 km²
- camp de roseLand acquired by a regional conservatory of natural areasIUCN IV19000 km²
- granatLand acquired by a regional conservatory of natural areasIUCN IV20240 km²
- montboisier estLand acquired by a regional conservatory of natural areasIUCN IV20240 km²
- Section à moules perlières de la TruyèreSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20190 km²
- les fisLand acquired by a regional conservatory of natural areasIUCN IV20240 km²
- Gorges de la JonteSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20160 km²
- les fangeiresLand acquired by a regional conservatory of natural areasIUCN IV20240 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
Sub-administrations154
- Albaret-Sainte-MarieCommune
- Albaret-le-ComtalCommune
- AllencCommune
- AltierCommune
- AntrenasCommune
- Arzenc-d'ApcherCommune
- Arzenc-de-RandonCommune
- Aumont-AubracCommune
- AurouxCommune
- Bagnols-les-BainsCommune
- BanassacCommune
- Barre-des-CévennesCommune
- BassurelsCommune
- BelvezetCommune
- BlavignacCommune
- BédouèsCommune
- CanilhacCommune
- CassagnasCommune
- ChadenetCommune
- Chambon-le-ChâteauCommune
- ChanacCommune
- ChasseradèsCommune
- ChastanierCommune
- ChauchaillesCommune
- ChaudeyracCommune
- ChaulhacCommune
- Cheylard-l'ÉvêqueCommune
- Châteauneuf-de-RandonCommune
- CocurèsCommune
- CubièresCommune
- CubiérettesCommune
- CulturesCommune
- EsclanèdesCommune
- Fau-de-PeyreCommune
- FloracCommune
- FontansCommune
- FournelsCommune
- Fraissinet-de-FourquesCommune
- Fraissinet-de-LozèreCommune
- GabriacCommune
- GabriasCommune
- GatuzièresCommune
- GrandrieuCommune
- GrandvalsCommune
- Hures-la-ParadeCommune
- IspagnacCommune
- JavolsCommune
- JuliangesCommune
- La Bastide-PuylaurentCommune
- La CanourgueCommune
- La Chaze-de-PeyreCommune
- La Fage-MontivernouxCommune
- La Fage-Saint-JulienCommune
- La MalèneCommune
- La PanouseCommune
- La Salle-PrunetCommune
- La TieuleCommune
- LajoCommune
- LangogneCommune
- LaubertCommune
- Laval-AtgerCommune
- Laval-du-TarnCommune
- Le BleymardCommune
- Le BuissonCommune
- Le Collet-de-DèzeCommune
- Le Malzieu-ForainCommune
- Le Malzieu-VilleCommune
- Le MassegrosCommune
- Le Monastier-Pin-MorièsCommune
- Le PompidouCommune
- Le Pont-de-MontvertCommune
- Le RecouxCommune
- Le RozierCommune
- Les BessonsCommune
- Les BondonsCommune
- Les HermauxCommune
- Les Monts-VertsCommune
- Les SalcesCommune
- Les VignesCommune
- LucCommune
- MalbouzonCommune
- MarvejolsCommune
- Mas-Saint-ChélyCommune
- Mas-d'OrcièresCommune
- MendeCommune
- Mende-NordSubdivision
- Mende-SudSubdivision
- MeyrueisCommune
- Moissac-Vallée-FrançaiseCommune
- MolezonCommune
- MontbrunCommune
- MontrodatCommune
- NasbinalsCommune
- NaussacCommune
- NoalhacCommune
- PalhersCommune
- Paulhac-en-MargerideCommune
- Pied-de-BorneCommune
- PierreficheCommune
- PourcharessesCommune
- PrinsuéjolsCommune
- PrévenchèresCommune
- Recoules-d'AubracCommune
- Recoules-de-FumasCommune
- RimeizeCommune
- RoussesCommune
- Saint-Alban-sur-LimagnoleCommune
- Saint-AmansSubdivision
- Saint-André-CapcèzeCommune
- Saint-André-de-LancizeCommune
- Saint-Andéol-de-ClerguemortCommune
- Saint-Bonnet-de-ChiracCommune
- Saint-Bonnet-de-MontaurouxCommune
- Saint-Chély-d'ApcherCommune
- Saint-Flour-de-MercoireCommune
- Saint-Frézal-d'AlbugesCommune
- Saint-Frézal-de-VentalonCommune
- Saint-Georges-de-LévéjacCommune
- Saint-Germain-de-CalberteCommune
- Saint-Germain-du-TeilCommune
- Saint-Hilaire-de-LavitCommune
- Saint-Jean-la-FouillouseCommune
- Saint-Julien-d'ArpaonCommune
- Saint-Julien-des-PointsCommune
- Saint-Julien-du-TournelCommune
- Saint-JuéryCommune
- Saint-Laurent-de-MuretCommune
- Saint-Laurent-de-TrèvesCommune
- Saint-Laurent-de-VeyrèsCommune
- Saint-Léger-de-PeyreCommune
- Saint-Léger-du-MalzieuCommune
- Saint-Martin-de-BoubauxCommune
- Saint-Martin-de-LansuscleCommune
- Saint-Maurice-de-VentalonCommune
- Saint-Michel-de-DèzeCommune
- Saint-Paul-le-FroidCommune
- Saint-Pierre-de-NogaretCommune
- Saint-Pierre-des-TripiersCommune
- Saint-Pierre-le-VieuxCommune
- Saint-Privat-de-VallongueCommune
- Saint-Privat-du-FauCommune
- Saint-Rome-de-DolanCommune
- Saint-Sauveur-de-GinestouxCommune
- Saint-Sauveur-de-PeyreCommune
- Saint-Étienne-Vallée-FrançaiseCommune
- Sainte-Colombe-de-PeyreCommune
- Sainte-Croix-Vallée-FrançaiseCommune
- Sainte-EnimieCommune
- ServeretteCommune
- TermesCommune
- TrélansCommune
- VebronCommune
- VialasCommune
- VillefortCommune
France-specific data (Phase 2)
ZNIEFF, Natura 2000, INPN protected spaces, BNV-D pesticides, Naïades water quality, SAFRAN fine climate, BRGM lithology — Layer FR to load in Phase 2.