Term
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Definition
| Cedar or limestone glades are open areas of rock pavement, gravel, flagstone, and/or shallow soil in which occur natural, long-persisting plant communities dominated by herbaceous angiosperms and/or crypotogams” (meaning in this blue green algae & lichens) |
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Term
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Definition
| summer annual grasses; winter annual, summer annual, and/or perennial herbaceous dicots; mosses; lichens |
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Term
| 3 rock outcrop communities |
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Definition
| granite, sandstone, limestone |
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Term
| Sandstone outcrops are common in the |
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Definition
| Piedmont and Coastal Plain |
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Term
| Limestone outcrops (Cedar glades) occur ONLY in the |
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Definition
| NW corner of the state, in the Ridge and Valley physiographic province |
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Term
| The regional climate of areas where cedar glades occur is |
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Definition
| quite favorable to plant growth, but is a poor indicator of microclimate in the glades |
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Term
| Conditions in the cedar glades, like those in granite outcrops, are |
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Definition
| extreme because of the near-absence of tree canopy and very thin soils |
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Term
| In fall and winter, the thin soils are often _____, while in summer they ________. |
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Definition
| saturated, dry beyond the wilting point of plants |
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Term
| As on granite outcrops, much of the change is controlled by |
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Definition
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Term
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Definition
| Juniperus virginiana trees (i.e. the “cedar” in “cedar glades”) |
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Term
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Definition
| occasional disturbances to cedar glades, but NOT the dominant type of disturbance |
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Term
| ____are the major sources of disturbance |
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Definition
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Term
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Definition
| often the shallowest soils are gravelly, and easily washed away or moved by heavy precipitation |
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Term
| Drought can of course affect any of the soil depths, but is most common |
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Definition
| where the soil is shallow; gravelly soils are the most susceptible to drought |
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Term
| Annuals that have many dormant seeds lying in the soil can easily |
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Definition
| re-colonize after a drought, but colonization by perennials is slower |
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Term
| Droughts that kill shrubs and trees (often they establish in creaks or crevices in the rock) |
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Definition
| reset the successional sequence |
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Term
| Cedar Glades major tree species |
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Definition
| eastern red cedar, Chinquapin oak, |
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Term
| The extreme of dryness of summer conditions in cedar glades probably contributes to |
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Definition
| the dominance in early succession by winter annual species in the genera Leavenworthia spp., Sedum pulchellum, and Minuartia patula. |
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Term
| These winter annuals grow in the |
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Definition
| shallowest and most xeric soils |
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Term
| Winter annuals complete their life cycle in one year |
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Definition
seeds actually germinate in the fall
young seedlings grow little or are semi-dormant during winter
they grow rapidly in early spring, and flower and produce seeds before summer drought |
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Term
| the most important factors that determine what plants grow in cedar glades |
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Definition
| The very high light levels (irradiance), and moisture stress due to thin soils |
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Term
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Definition
| . found only in cedar glades |
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Term
| Current threats to cedar glade habitat are |
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Definition
| diverse, with no single dominant concern |
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