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An alvar is a biological environment based on a limestone plain with thin or no soil and, as a result, sparse grassland vegetation. Often flooded in the spring, and affected by drought in midsummer, alvars support a distinctive group of prairie-like plants. Most alvars occur either in northern Europe or around the Great Lakes in North America. This…
Geography & Regions
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alvars species limestone also north habitat plants soil estonian rare estonia grassland europe may one areas america exposed many provide
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Alvar | is a | biological environment based on a limestone plain with thin or no soil and | 0.90 | text |
| Pellaea atropurpurea | instance of | and which may provide habitat for unusual ferns | 0.80 | text |
| the sandwort Minuartia michauxii | instance of | Bare rock flats provide areas with extremely low competition that serve as refugia for weak competitors | 0.80 | text |
| Micranthes virginiensis | instance of | Bare rock flats provide areas with extremely low competition that serve as refugia for weak competitors | 0.80 | text |
| bobolinks | instance of | alvars provide habitat for birds | 0.80 | text |
| eastern meadowlarks | instance of | alvars provide habitat for birds | 0.80 | text |
| upland sandpipers | instance of | alvars provide habitat for birds | 0.80 | text |
| eastern towhees | instance of | alvars provide habitat for birds | 0.80 | text |
| brown thrashers | instance of | alvars provide habitat for birds | 0.80 | text |
| loggerhead shrikes whose habitat is declining elsewhere | instance of | alvars provide habitat for birds | 0.80 | text |
| Alvar | related to European alvar locations | SwedenÖland | 0.60 | section |
| Alvar | related to European alvar locations | Stora Alvaret | 0.60 | section |
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