How Rising CO2 Levels Boost C4 Grass Production

References: CO₂ Fertilization, Grasslands and Savanna Ecosystems

This reference list includes peer-reviewed research on atmospheric CO₂,
terrestrial photosynthesis, C₃ and C₄ grasses, savanna vegetation,
drought response, plant water-use efficiency, carbon cycling and ecosystem modelling.

1. Chen, C., Riley, W. J., Prentice, I. C. & Keenan, T. F.
   CO₂ fertilization of terrestrial photosynthesis inferred from site to global scales.
   Proc. Natl Acad. Sci. USA 119, e2115627119 (2022).

     <p class="c-article-references__links u-hide-print">
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="10.1073/pnas.2115627119"
         data-track-item_id="10.1073/pnas.2115627119"
         data-track-value="article reference"
         data-track-action="article reference"
         href="https://doi.org/10.1073/pnas.2115627119"
         aria-label="Read Chen et al. 2022 article"
         data-doi="10.1073/pnas.2115627119"
       >Article</a>
   
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="link"
         data-track-item_id="link"
         data-track-value="pubmed reference"
         data-track-action="pubmed reference"
         href="https://pubmed.ncbi.nlm.nih.gov/35238668/"
         aria-label="View Chen et al. 2022 on PubMed"
       >PubMed</a>
   
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="link"
         data-track-item_id="link"
         data-track-value="pubmed central reference"
         data-track-action="pubmed central reference"
         href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8915860/"
         aria-label="View Chen et al. 2022 in PubMed Central"
       >PubMed Central</a>
   
       <a
         data-track="click_references"
         data-track-action="google scholar reference"
         data-track-value="google scholar reference"
         data-track-label="link"
         data-track-item_id="link"
         rel="nofollow noopener"
         aria-label="Find Chen et al. 2022 on Google Scholar"
         href="https://scholar.google.com/scholar_lookup?title=CO2%20fertilization%20of%20terrestrial%20photosynthesis%20inferred%20from%20site%20to%20global%20scales&amp;journal=Proc.%20Natl%20Acad.%20Sci.%20USA&amp;doi=10.1073%2Fpnas.2115627119&amp;volume=119&amp;publication_year=2022&amp;author=Chen,C&amp;author=Riley,WJ&amp;author=Prentice,IC&amp;author=Keenan,TF"
       >Google Scholar</a>
     </p>
   </li>
   
   <li class="c-article-references__item js-c-reading-companion-references-item" data-counter="2.">
     <p class="c-article-references__text" id="ref-CR2">
       Forzieri, G., Dakos, V., McDowell, N. G., Ramdane, A. &amp; Cescatti, A.
       Emerging signals of declining forest resilience under climate change.
       <i>Nature</i> <b>608</b>, 534–539 (2022).
     </p>
   
     <p class="c-article-references__links u-hide-print">
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="10.1038/s41586-022-04959-9"
         data-track-item_id="10.1038/s41586-022-04959-9"
         data-track-value="article reference"
         data-track-action="article reference"
         href="https://doi.org/10.1038/s41586-022-04959-9"
         aria-label="Read Forzieri et al. 2022 article"
         data-doi="10.1038/s41586-022-04959-9"
       >Article</a>
   
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="link"
         data-track-item_id="link"
         data-track-value="pubmed reference"
         data-track-action="pubmed reference"
         href="https://pubmed.ncbi.nlm.nih.gov/35831499/"
         aria-label="View Forzieri et al. 2022 on PubMed"
       >PubMed</a>
   
       <a
         data-track="click_references"
         rel="nofollow noopener"
         data-track-label="link"
         data-track-item_id="link"
         data-track-value="pubmed central reference"
         data-track-action="pubmed central reference"
         href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9385496/"
         aria-label="View Forzieri et al. 2022 in PubMed Central"
       >PubMed Central</a>
     </p>
   </li>
   
   <!-- Preserve the remaining references exactly as supplied.
        Continue using the same li, p, i, b, sub and a elements. -->