{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T14:56:33Z","timestamp":1785509793805,"version":"3.56.0"},"reference-count":45,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2024,7,23]],"date-time":"2024-07-23T00:00:00Z","timestamp":1721692800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000001","name":"NSF ASCEND Biology Integration Institute (BII)","doi-asserted-by":"publisher","award":["DBI 2021898"],"award-info":[{"award-number":["DBI 2021898"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"NSF ASCEND Biology Integration Institute (BII)","doi-asserted-by":"publisher","award":["DEB 1638720"],"award-info":[{"award-number":["DEB 1638720"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"NSF ASCEND Biology Integration Institute (BII)","doi-asserted-by":"publisher","award":["WIS03008"],"award-info":[{"award-number":["WIS03008"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"name":"NSF Macrosystems Biology and NEON-Enabled Science (MSB-NES)","award":["DBI 2021898"],"award-info":[{"award-number":["DBI 2021898"]}]},{"name":"NSF Macrosystems Biology and NEON-Enabled Science (MSB-NES)","award":["DEB 1638720"],"award-info":[{"award-number":["DEB 1638720"]}]},{"name":"NSF Macrosystems Biology and NEON-Enabled Science (MSB-NES)","award":["WIS03008"],"award-info":[{"award-number":["WIS03008"]}]},{"name":"USDA McIntire-Stennis Award","award":["DBI 2021898"],"award-info":[{"award-number":["DBI 2021898"]}]},{"name":"USDA McIntire-Stennis Award","award":["DEB 1638720"],"award-info":[{"award-number":["DEB 1638720"]}]},{"name":"USDA McIntire-Stennis Award","award":["WIS03008"],"award-info":[{"award-number":["WIS03008"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Chlorophyll fluorescence is a well-established method to estimate chlorophyll content in leaves. A popular fluorescence-based meter, the Opti-Sciences CCM-300 Chlorophyll Content Meter (CCM-300), utilizes the fluorescence ratio F735\/F700 and equations derived from experiments using broadleaf species to provide a direct, rapid estimate of chlorophyll content used for many applications. We sought to quantify the performance of the CCM-300 relative to more intensive methods, both across plant functional types and years of use. We linked CCM-300 measurements of broadleaf, conifer, and graminoid samples in 2018 and 2019 to high-performance liquid chromatography (HPLC) and\/or spectrophotometric (Spec) analysis of the same leaves. We observed a significant difference between the CCM-300 and HPLC\/Spec, but not between HPLC and Spec. In comparison to HPLC, the CCM-300 performed better for broadleaves (r = 0.55, RMSE = 154.76) than conifers (r = 0.52, RMSE = 171.16) and graminoids (r = 0.32, RMSE = 127.12). We observed a slight deterioration in meter performance between years, potentially due to meter calibration. Our results show that the CCM-300 is reliable to demonstrate coarse variations in chlorophyll but may be limited for cross-plant functional type studies and comparisons across years.<\/jats:p>","DOI":"10.3390\/s24154784","type":"journal-article","created":{"date-parts":[[2024,7,24]],"date-time":"2024-07-24T10:46:20Z","timestamp":1721817980000},"page":"4784","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Evaluation of the Reliability of the CCM-300 Chlorophyll Content Meter in Measuring Chlorophyll Content for Various Plant Functional Types"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-3417-6901","authenticated-orcid":false,"given":"Joelie M.","family":"Van Beek","sequence":"first","affiliation":[{"name":"Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ting","family":"Zheng","sequence":"additional","affiliation":[{"name":"Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhihui","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA"},{"name":"Guangdong Provincial Key Laboratory of Remote Sensing and Geographical Information System, Guangdong Open Laboratory of Geospatial Information Technology and Application, Guangzhou Institute of Geography, Guangdong Academy of Sciences, Guangzhou 510070, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1498-6363","authenticated-orcid":false,"given":"Kyle R.","family":"Kovach","sequence":"additional","affiliation":[{"name":"Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7003-8774","authenticated-orcid":false,"given":"Philip A.","family":"Townsend","sequence":"additional","affiliation":[{"name":"Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,23]]},"reference":[{"key":"ref_1","unstructured":"Liang, S. 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