Bioturbation rates in Bahía la Choya, Sonora, Mexico
Experimental determination of sediment reworking rates in a subtropical intertidal flat environment yielded information about the amount, nature and implications of sediment reworking in nearshore deposits. Callianassid shrimp in Bahía La Choya, Sonora, Mexico, overturn the sediment in the inner fl...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
1996-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/837 |
| _version_ | 1797278670568554496 |
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| author | J Lynn-Myrick KW Flessa |
| author_facet | J Lynn-Myrick KW Flessa |
| author_sort | J Lynn-Myrick |
| collection | DOAJ |
| description |
Experimental determination of sediment reworking rates in a subtropical intertidal flat environment yielded information about the amount, nature and implications of sediment reworking in nearshore deposits. Callianassid shrimp in Bahía La Choya, Sonora, Mexico, overturn the sediment in the inner flats at an average rate of 0.56 m3/m2/year. Elasmobranch rays overturn the sediment in the midflats at an average rate of 1.01 m3/m2/year. Resin castings indicate that the shrimp are capable of burrowing to a depth of at least 1.15 m and, where present, can completely rework this interval in Bahía La Choya in two years. The rays reach a maximum observed burrowing depth of 20 cm and, where present, can completely rework this interval in Bahía La Choya in 72 days. Reworking rates are high enough to preclude the preservation of most physical sedimentary structures under normal conditions. Only large-scale sedimentary structures or those buried deeply and rapidly are likely to escape reworking. Rates of biogenic sedimentation by callianassid shrimp are high enough to generate subsurface shell beds. Short-term biogenic sedimentation rates are higher than long-term rates, indicating that such intertidal sediments are not only thoroughly reworked, but are incomplete at time scales of weeks to months.
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| first_indexed | 2024-03-07T16:12:36Z |
| format | Article |
| id | doaj.art-0aa03e17f7bc4b4b874a63d756994358 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:12:36Z |
| publishDate | 1996-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-0aa03e17f7bc4b4b874a63d7569943582024-03-04T16:43:23ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90531996-03-0122110.7773/cm.v22i1.837Bioturbation rates in Bahía la Choya, Sonora, MexicoJ Lynn-Myrick0KW Flessa1University of ArizonaUniversity of Arizona Experimental determination of sediment reworking rates in a subtropical intertidal flat environment yielded information about the amount, nature and implications of sediment reworking in nearshore deposits. Callianassid shrimp in Bahía La Choya, Sonora, Mexico, overturn the sediment in the inner flats at an average rate of 0.56 m3/m2/year. Elasmobranch rays overturn the sediment in the midflats at an average rate of 1.01 m3/m2/year. Resin castings indicate that the shrimp are capable of burrowing to a depth of at least 1.15 m and, where present, can completely rework this interval in Bahía La Choya in two years. The rays reach a maximum observed burrowing depth of 20 cm and, where present, can completely rework this interval in Bahía La Choya in 72 days. Reworking rates are high enough to preclude the preservation of most physical sedimentary structures under normal conditions. Only large-scale sedimentary structures or those buried deeply and rapidly are likely to escape reworking. Rates of biogenic sedimentation by callianassid shrimp are high enough to generate subsurface shell beds. Short-term biogenic sedimentation rates are higher than long-term rates, indicating that such intertidal sediments are not only thoroughly reworked, but are incomplete at time scales of weeks to months. http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/837bioturbationsediment reworkingcallianassid shrimpelasmobranch rays |
| spellingShingle | J Lynn-Myrick KW Flessa Bioturbation rates in Bahía la Choya, Sonora, Mexico Ciencias Marinas bioturbation sediment reworking callianassid shrimp elasmobranch rays |
| title | Bioturbation rates in Bahía la Choya, Sonora, Mexico |
| title_full | Bioturbation rates in Bahía la Choya, Sonora, Mexico |
| title_fullStr | Bioturbation rates in Bahía la Choya, Sonora, Mexico |
| title_full_unstemmed | Bioturbation rates in Bahía la Choya, Sonora, Mexico |
| title_short | Bioturbation rates in Bahía la Choya, Sonora, Mexico |
| title_sort | bioturbation rates in bahia la choya sonora mexico |
| topic | bioturbation sediment reworking callianassid shrimp elasmobranch rays |
| url | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/837 |
| work_keys_str_mv | AT jlynnmyrick bioturbationratesinbahialachoyasonoramexico AT kwflessa bioturbationratesinbahialachoyasonoramexico |