Ziemeļvidzemes biosfēras rezervāts
IUCN VBiosphere Reserve · 1997
4 758 km²
District · LVA
Valka
Latvia
DfbCold, no dry season, warm summer(100 %)
Species observed
4 879
Observations
33 747
Area
2 445,7km²
Ecological tissue
Sample of 26 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 Valka : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 87 interactions GloBI sur 5 types (connectance 26.8%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
26
Interactions affichées
87
Connectance
0.268
Patrimoniales
1
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
4 879 distinct species · 33 747 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
5,9°C
Annual rain
724mm
Warmest m°
21,5°C
Coldest m°
-8,0°C
Elevation: 84 m on average (min 44 m, max 220 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
5,9°C
Annual rain
724mm
Warmest month
21,5°C
Coldest month
-8,0°C
Mean alt.
84m
Min
44m
Max
220m
Std. dev.
39m
Köppen-Geiger (dominant)
DfbCold, no dry season, warm summer(100 %)Cold
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,6
Org. C
80,3g/kg
Clay
13,6%
Sand
53,6%
Silt
32,8%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,6
Org. C
122,0g/kg
Clay
13,4%
Sand
53,4%
Silt
33,2%
5–15 cm
pH H₂O
5,7
Org. C
81,8g/kg
Clay
13,0%
Sand
53,9%
Silt
33,0%
15–30 cm
pH H₂O
5,7
Org. C
37,1g/kg
Clay
14,4%
Sand
53,3%
Silt
32,3%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest55.9%
Crops22.2%
Built-up0.1%
Bare soil0.1%
Other (grassland, water…)21.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology9 basins · 17 lakes · 40 rivers
Hydrology metrics for this exact territory
Stream length here
575,7km
Lake surface here
3,93km²
Basins crossed
9
Max stream order
5
Max drainage
7 894km²
Discharge in basins
66,6m³/s
Mean precip.
655mm/an
Mean T°
5,2°C
Moisture idx
0,11
Max snow
39%
Mean runoff
330mm/an
Mean elev. (basins)
85m
Watersheds crossing here
- Bassin de Gaujasub-area1 337,4 km²overlap1018.49 km²42%
- Bassin de Salacasub-area3 569 km²overlap504.17 km²21%
- Bassin de Abulssub-area590,2 km²overlap416.11 km²17%
- Bassin de Gaujasub-area1 115,8 km²overlap391.78 km²16%
- Bassin de Pedeli jõgisub-area224,9 km²overlap87.67 km²4%
- Bassin de Õhne jõgisub-area661,6 km²overlap18.26 km²1%
- Bassin de Gaujasub-area1 546 km²overlap5.90 km²0%
- Bassin de Gaujasub-area825 km²overlap3.32 km²0%
- Bassin de Purtsi jõgisub-area490,4 km²overlap0.06 km²0%
Lakes (17, top by area)
- Lac 1303245area0,6 km²avg depth3.4 m
- Lac 1303248area0,4 km²avg depth2.7 m
- Lac 1303228area0,4 km²avg depth2.9 m
- Lac 1304511area0,4 km²avg depth3.6 m
- Lac 1304291area0,3 km²avg depth3.7 m
- Lac 1303443area0,3 km²avg depth3.3 m
- Lac 1302117area0,3 km²avg depth3.0 m
- Lac 1302506area0,2 km²avg depth4.1 m
- Lac 1302160area0,2 km²avg depth1.7 m
8 more lakes
Rivers / streams (40, ord ≥ 4)
- Gaujaord 5len here69.80 km16%total433 km
- Vijaord 3len here69.41 km100%total69 km
- Abulsord 3len here49.82 km75%total67 km
- Sedaord 3len here43.86 km63%total69 km
- Nigraord 1len here36.45 km100%total36 km
- Palsaord 2len here23.92 km43%total56 km
- Rauzaord 2len here21.96 km100%total22 km
- Stakļupīteord 2len here18.31 km100%total18 km
- Strenčupīteord 2len here16.77 km100%total17 km
- Ķireord 1len here16.20 km90%total18 km
- Vizlaord 2len here16.05 km86%total19 km
- Pedeli jõgiord 2len here15.54 km51%total30 km
28 more river segmentssorted by Strahler order + length
- Rikandaord 2len here15.12 km100%total15 km
- Vecpalsaord 3len here12.40 km100%total12 km
- Nārvelisord 1len here11.53 km100%total12 km
- Kiviste krord 1len here11.39 km60%total19 km
- Acupīteord 3len here10.90 km32%total34 km
- Kamaldaord 1len here10.56 km100%total11 km
- Vīķupīteord 3len here10.54 km100%total11 km
- Šepkaord 2len here9.43 km100%total9 km
- Stepupeord 5len here8.88 km100%total9 km
- Pubuļupeord 1len here8.74 km100%total9 km
- Kurmīšupīteord 1len here8.22 km100%total8 km
- Melderupīteord 2len here8.06 km100%total8 km
- Gauja / Koiva jõgiord 5len here7.95 km50%total16 km
- Lisaord 2len here7.10 km21%total34 km
- Kaičupeord 2len here5.96 km94%total6 km
- Pauna ojaord 5len here5.30 km74%total7 km
- Ančupīteord 1len here4.46 km100%total4 km
- Õhne jõgiord 3len here3.82 km4%total104 km
- Ruņģu strautsord 1len here3.44 km100%total3 km
- Jaunpalsaord 2len here3.31 km100%total3 km
- Lielupeord 1len here2.88 km85%total3 km
- Pirkuļupeord 1len here2.40 km100%total2 km
- Ērgļupīteord 3len here2.11 km100%total2 km
- Mustjõgiord 5len here1.43 km2%total66 km
- Krāčupeord 2len here0.94 km89%total1 km
- Ošupīteord 1len here0.74 km20%total4 km
- Setteojaord 1len here0.04 km1%total4 km
- Laanemetsa ojaord 2len here≈ tangenttotal24 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,1nW
Built-up
10,7%
Pesticides
7,5kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas75
IUCN Not Reported · 25IUCN IV · 21IUCN Not Assigned · 17IUCN III · 6IUCN V · 4IUCN Ib · 1IUCN VI · 1🌊 Marine · 1📍 Point sites · 1
Ziemeļgauja
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2004
218 km²
Ziemeļgauja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2022
218 km²
Ziemeļgauja
IUCN VProtected Landscape Area · 2004
218 km²
Sedas purvs
IUCN IVNature Reserve · 1999
73 km²
Sedas purvs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2022
73 km²
Complete list75 protected areas
- Ziemeļvidzemes biosfēras rezervātsBiosphere ReserveIUCN V19974 758 km²
- ZiemeļgaujaSpecial Protection Area (Birds Directive)IUCN Not Reported2004218 km²
- ZiemeļgaujaSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported2022218 km²
- ZiemeļgaujaProtected Landscape AreaIUCN V2004218 km²
- Sedas purvsNature ReserveIUCN IV199973 km²
- Sedas purvsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported202273 km²
- Sedas purvsSpecial Protection Area (Birds Directive)IUCN Not Reported200473 km²
- Koiva-MustjõeSpecial Protection Area (Birds Directive)IUCN Not Reported200437 km²
- Koiva-Mustjõe luhaSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200532 km²
- Koiva-Mustjõe maastikukaitsealaProtected landscape (nature park)IUCN Not Assigned195732 km²
- MežoleSpecial Protection Area (Birds Directive)IUCN Not Reported200428 km²
- MežoleSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported202228 km²
- MežoleNature ReserveIUCN IV199928 km²
- Koiva-Mustjõe MKA, Koiva pv.Limited management zone of protected landscapeIUCN V200517 km²
- RauzaNature ReserveIUCN IV20048 km²
- RauzaSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20228 km²
- LasaSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20055 km²
- ŠepkaSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20224 km²
- ŠepkaNature ReserveIUCN IV20044 km²
- Koiva-Mustjõe MKA, Koiva konnu skv.Managed conservation zone of protected landscapeIUCN IV20053 km²
- Kārķu purvsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20223 km²
- Kārķu purvsNature ReserveIUCN IV19773 km²
- Vadaiņu purvsNature ReserveIUCN IV19772 km²
- Vadaiņu purvsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20222 km²
- Vidagas upes mežiNature ReserveIUCN IV20232 km²
- Koiva-Mustjõe MKA, Parnika skv.Managed conservation zone of protected landscapeIUCN IV20052 km²
- Burgas pļavasNature ReserveIUCN IV20042 km²
- Burgas pļavasSpecial Protection Area (Birds Directive)IUCN Not Reported20042 km²
- Burgas pļavasSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20222 km²
- LaunkalneSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20222 km²
- LaunkalneNature ReserveIUCN IV20042 km²
- Igaunijas riestsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20222 km²
- Igaunijas riestsMicro-reserveIUCN IV20032 km²
- Lielais purvsNature ReserveIUCN IV19771 km²
- Lielais purvsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20221 km²
- PalakmäeSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20051 km²
- Koiva-Mustjõe MKA, Parmu skv.Wilderness conservation zone of protected landscapeIUCN Ib20051 km²
- VEP nr.127229Woodland key habitatIUCN Not Assigned20031 km²
- MustjõgiSpawning areaIUCN Not Assigned20221 km²
- Bērzoles riestsMicro-reserveIUCN IV20041 km²
- Bērzoles riestsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20221 km²
- Bulvāra riestsMicro-reserveIUCN IV20041 km²
- Bulvāra riestsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20221 km²
- Koiva-Mustjõe MKA, Vaitka skv.Managed conservation zone of protected landscapeIUCN IV20051 km²
- Koiva jõgiSpawning areaIUCN Not Assigned20221 km²
- Šepkas riestsMicro-reserveIUCN IV20040 km²
- Šepkas riestsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20220 km²
- Õhne jõe hoiualaLimited-conservation areaIUCN VI20060 km²
- Purgailes upes mežiNature ReserveIUCN IV20230 km²
- Bednes purvsNature ReserveIUCN IV19770 km²
- Bednes purvsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20220 km²
- Koiva-Mustjõe MKA, Alakonnu skv.Managed conservation zone of protected landscapeIUCN V20050 km²
- VEP nr.L01980Woodland key habitatIUCN Not Assigned20110 km²
- Silvas dendrārijsNature MonumentIUCN III20010 km²
- Palsmanes parksNature MonumentIUCN III19870 km²
- Rāmnieku smilšakmens atsegumiNature MonumentIUCN III19770 km²
- Spiģu alaNature MonumentIUCN III20010 km²
- VEP nr.208403Woodland key habitatIUCN Not Assigned20200 km²
- VEP nr.208485Woodland key habitatIUCN Not Assigned20200 km²
- VEP nr.L01724Woodland key habitatIUCN Not Assigned20110 km²
+ 15 protected areas (top 60 shown)
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN